diff --git a/ANNOUNCE b/ANNOUNCE
index fd836eb..ab7b188 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,168 +1,90 @@
 
-Libpng 1.0.51rc01 - November 18, 2009
+Libpng 1.0.51 - December 3, 2009
 
-This is not intended to be a public release.  It will be replaced
-within a few weeks by a public version or by another test version.
+This is a public release of libpng, intended for use in production codes.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.0.51rc01.tar.xz (LZMA-compressed, recommended)
-   libpng-1.0.51rc01.tar.gz
-   libpng-1.0.51rc01.tar.bz2
+   libpng-1.0.51.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.51.tar.gz
+   libpng-1.0.51.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.0.51rc01-no-config.tar.xz (LZMA-compressed, recommended)
-   libpng-1.0.51rc01-no-config.tar.gz
-   libpng-1.0.51rc01-no-config.tar.bz2
+   libpng-1.0.51-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.51-no-config.tar.gz
+   libpng-1.0.51-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1051r01.zip
-   lp1051r01.7z
-   lp1051r01.tar.bz2
+   lpng1051.zip
+   lpng1051.7z
+   lpng1051.tar.bz2
 
 Project files
 
-   libpng-1.0.51rc01-project-netware.zip
-   libpng-1.0.51rc01-project-wince.zip
+   libpng-1.0.51-project-netware.zip
+   libpng-1.0.51-project-wince.zip
 
 Other information:
 
-   libpng-1.0.51rc01-README.txt
-   libpng-1.0.51rc01-KNOWNBUGS.txt
-   libpng-1.0.51rc01-LICENSE.txt
-   libpng-1.0.51rc01-Y2K-compliance.txt
-   libpng-1.0.51rc01-[previous version]-diff.txt
+   libpng-1.0.51-README.txt
+   libpng-1.0.51-KNOWNBUGS.txt
+   libpng-1.0.51-LICENSE.txt
+   libpng-1.0.51-Y2K-compliance.txt
 
 Changes since the last public release (1.0.50):
 
-version 1.2.41beta01 [September 25, 2009]
+version 1.0.51 [December 3, 2009]
+
   Moved redundant IHDR checking into new png_check_IHDR() in png.c
     and report all errors found in the IHDR data.
   Eliminated useless call to png_check_cHRM() from pngset.c
   Expanded TAB characters in pngrtran.c
-
-version 1.2.41beta02 [September 30, 2009]
-  Revised png_check_IHDR().
-
-version 1.2.41beta03 [October 1, 2009]
-  Revised png_check_IHDR() again, to check info_ptr members instead of
-    the contents of the returned parameters.
-
-version 1.2.41beta04 [October 7, 2009]
   Added "xcode" project similar one already in libpng-1.4.0beta (Alam Arias).
-  Ported some cosmetic changes from libpng-1.4.0beta86.
   Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
-
-version 1.2.41beta05 [October 17, 2009]
   Revised pngconf.h to make it easier to enable iTXt support.  From libpng
     version 1.2.9 through 1.2.40, defining PNG_iTXt_SUPPORTED did not work
     as expected.
-  Ported some cosmetic changes from libpng-1.4.0beta87, changing
-    many "#if defined(x)" to "#ifdef x".
-
-version 1.2.41beta06 [October 18, 2009]
-  Restored PNG_USE_LOCAL_ARRAYS code in pngread.c that was inadvertently
-    deleted in libpng-1.2.41beta05.
   Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
-    as in libpng-1.4.0beta78 and later.
-
-version 1.2.41beta07 [October 21, 2009]
-  Ported some cosmetic changes from libpng-1.4.0rc01, changing
-    many "#if defined(x)" to "#ifdef x" in png.h and pngconf.h.
-
-version 1.2.41beta08 [October 30, 2009]
-  Ported from libpng-1.4.0rc01: png_calloc(), png_get_io_chunk_name(),
-    png_get_io_state(), png_set_user_cache_max(), png_get_user_cache_max(),
-    png_set_premultiply_alpha, and png_do_read_premultiply_alpha().
+  Changed many "#if defined(x)" to "#ifdef x" and fixed some indentation.
+  Added png_calloc() as a non-exported function.
   Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
     This avoids building 16-bit gamma tables unnecessarily.
-
-version 1.2.41beta09 [November 1, 2009]
   Removed a harmless extra png_set_invert_alpha() from pngwrite.c
-  More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
+  Bugfixes and improvements to CMakeLists.txt (Philip Lowman)
   Moved CMakeLists.txt from scripts into the main libpng directory.
-  Apply png_user_chunk_cache_max within png_decompress_chunk().
-  Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
-
-version 1.2.41beta10 [November 1, 2009]
-  Enabled iTXt support by default. To ensure binary compatibility with
-    previous versions, the "lang" and "lang_key" members will be assumed
-    to be omitted from previous versions unless the current libpng
-    version was built with PNG_iTXt_SUPPORTED (which is otherwise no
-    longer necessary to gain iTXt support), as a signal that the user has
-    been building previous versions with PNG_iTXt_SUPPORTED as well.
-
-version 1.2.41beta11 [November 2, 2009]
-  Store user's user_png_ver in new png_ptr->user_png_ver element.
-  Revised iTXt support. To ensure binary compatibility with
-    previous versions, the "lang" and "lang_key" members will be assumed
-    to be omitted from versions prior to 1.2.41beta11 whenever there is a
-    library mismatch.
-
-version 1.2.41beta12 [November 2, 2009]
-  Free png_ptr->user_png_ver when destroying png_ptr.
-
-version 1.2.41beta13 [November 3, 2009]
-  Updated scripts/pngw32.def and projects/wince/png32ce.def
-  Copied projects/wince/png32ce.def to the scripts directory.
-  Added scripts/makefile.wce
   Patched ltmain.sh for wince support.
   Added PNG_CONVERT_tIME_SUPPORTED macro.
-
-version 1.2.41beta14 [November 8, 2009]
-  versions 1.2.41beta05 through 1.2.41beta13 were abandoned.
   Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
-  Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
-  Reverted iTXt compatibility stuff from 1.2.41beta05, 1.2.41beta11, and
-    1.2.41beta12.
-  Reverted IOSTATE feature, user_cache_max, and premultiply_alpha features
-    from 1.2.41beta08.
-  Retained png_calloc() from 1.2.41beta08 but as a non-exported function,
-    and removed reference to png_calloc from scripts/*.def
-
-version 1.2.41beta15 [November 8, 2009]
+  Updated scripts/pngw32.def and projects/wince/png32ce.def
+  Copied projects/wince/png32ce.def to the scripts directory.
+  Added scripts/makefile.cegcc
   Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
     PNG_ALLOCATED macros to detect deprecated direct access to the
     png_struct or info_struct members and other deprecated usage in
     applications (John Bowler).
-  Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS,
-    to prevent warnings about direct access to png structs by libpng
-    functions while building libpng.  They need to be tested, especially
-    those using compilers other than gcc.
-  Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG".
-
-version 1.2.41beta16 [November 9, 2009]
   Removed three direct references to read_info_ptr members in pngtest.c
     that were detected by the new PNG_DEPSTRUCT macro.
-  Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
-
-version 1.2.41beta17 [November 10, 2009]
-  Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
   Marked deprecated function prototypes with PNG_DEPRECATED.
   Marked memory allocation function prototypes with PNG_ALLOCATED.
   Changed png_check_sig() to !png_sig_cmp() in contrib programs.
   Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c
-  Added "-DPNG_CONFIGURE_LIBPNG" to the contrib/pngminum makefiles.
-
-version 1.2.41beta18 [November 11, 2009]
-  Renamed scripts/makefile.wce to scripts/makefile.cegcc
   Marked nonexported functions with PNG_PRIVATE macro.
-
-version 1.2.41beta18 [November 11, 2009]
-  Revised scripts/*.def to reflect functions actually exported by libpng.
-
-version 1.2.41rc01 and 1.0.51rc01 [November 18, 2009]
   Revised scripts/*.def to reflect functions actually exported by libpng.
   Updated the copyright year in scripts/pngw32.rc from 2004 to 2009.
   Moved descriptions of makefiles and other scripts out of INSTALL into
     scripts/README.txt
+  Rebuilt the configure scripts with autoconf-2.65
+  Disabled the new pedantic warnings about deprecated function use and
+    deprecated structure access unless the user defines PNG_PEDANTIC_WARNINGS.
+  Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
+  Updated the list of files and made some cosmetic changes in README.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
diff --git a/CHANGES b/CHANGES
index 6810a5a..0bb5810 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2581,6 +2581,19 @@
   Moved descriptions of makefiles and other scripts out of INSTALL into
     scripts/README.txt
 
+version 1.2.41rc02 [November 22, 2009]
+  Rebuilt the configure scripts with autoconf-2.65
+
+version 1.2.41rc03 [November 25, 2009]
+  Disabled the new pedantic warnings about deprecated function use
+    and deprecated structure access unless the user defines
+    PNG_PEDANTIC_WARNINGS.
+  Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
+  Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
+
+version 1.2.41 [December 3, 2009]
+  Updated the list of files and made some cosmetic changes in README.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/INSTALL b/INSTALL
index 99ac374..441e311 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.51rc01 - November 18, 2009
+Installing libpng version 1.0.51 - December 3, 2009
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -46,7 +46,7 @@
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.0.51rc01" or "libpng10" and "zlib-1.2.3"
+might be called "libpng-1.0.51" or "libpng10" and "zlib-1.2.3"
 or "zlib123") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
diff --git a/KNOWNBUG b/KNOWNBUG
index 4af2f93..fc1a5c5 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.0.51rc01
+Known bugs in libpng version 1.0.51
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index 81720d7..ea2ff94 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.51rc01, November 18, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.51, December 3, 2009, are
 Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-November 18, 2009
+December 3, 2009
diff --git a/Makefile.am b/Makefile.am
index 3d0fca6..49bef27 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,13 +18,13 @@
 pngtest_SOURCES = pngtest.c
 pngtest_LDADD = libpng10.la
 TESTS = test-pngtest.sh
-TESTS_ENVIRONMENT= srcdir=$(srcdir) 
+TESTS_ENVIRONMENT= srcdir=$(srcdir)
 
 # man pages
 dist_man_MANS= libpng.3 libpngpf.3 png.5
 
 # generate the -config scripts if required
-binconfigs= libpng10-config 
+binconfigs= libpng10-config
 EXTRA_SCRIPTS= libpng-config libpng10-config
 bin_SCRIPTS= @binconfigs@
 
@@ -86,7 +86,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.51rc01.txt pngvcrd.c 
+	example.c libpng-1.0.51.txt pngvcrd.c
 
 CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 9dd0b2f..3691d0f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -106,14 +106,14 @@
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(libpng_la_LDFLAGS) $(LDFLAGS) -o $@
 libpng10_la_LIBADD =
-am_libpng10_la_OBJECTS = libpng10_la-png.lo \
-	libpng10_la-pngset.lo libpng10_la-pngget.lo \
-	libpng10_la-pngrutil.lo libpng10_la-pngtrans.lo \
-	libpng10_la-pngwutil.lo libpng10_la-pngread.lo \
-	libpng10_la-pngrio.lo libpng10_la-pngwio.lo \
-	libpng10_la-pngwrite.lo libpng10_la-pngrtran.lo \
-	libpng10_la-pngwtran.lo libpng10_la-pngmem.lo \
-	libpng10_la-pngerror.lo libpng10_la-pngpread.lo
+am_libpng10_la_OBJECTS = libpng10_la-png.lo libpng10_la-pngset.lo \
+	libpng10_la-pngget.lo libpng10_la-pngrutil.lo \
+	libpng10_la-pngtrans.lo libpng10_la-pngwutil.lo \
+	libpng10_la-pngread.lo libpng10_la-pngrio.lo \
+	libpng10_la-pngwio.lo libpng10_la-pngwrite.lo \
+	libpng10_la-pngrtran.lo libpng10_la-pngwtran.lo \
+	libpng10_la-pngmem.lo libpng10_la-pngerror.lo \
+	libpng10_la-pngpread.lo
 libpng10_la_OBJECTS = $(am_libpng10_la_OBJECTS)
 libpng10_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
@@ -246,7 +246,7 @@
 am__untar = @am__untar@
 
 # generate the -config scripts if required
-binconfigs = libpng10-config 
+binconfigs = libpng10-config
 bindir = @bindir@
 build = @build@
 build_alias = @build_alias@
@@ -300,7 +300,7 @@
 pngtest_SOURCES = pngtest.c
 pngtest_LDADD = libpng10.la
 TESTS = test-pngtest.sh
-TESTS_ENVIRONMENT = srcdir=$(srcdir) 
+TESTS_ENVIRONMENT = srcdir=$(srcdir)
 
 # man pages
 dist_man_MANS = libpng.3 libpngpf.3 png.5
@@ -320,9 +320,8 @@
 libpng10_la_CPPFLAGS = @LIBPNG_DEFINES@
 
 # MAJOR UPGRADE: the version-number settings below must be changed.
-libpng10_la_LDFLAGS = -no-undefined -export-dynamic \
-	-version-number 0:@PNGLIB_RELEASE@:0 $(am__append_1) \
-	$(am__append_2)
+libpng10_la_LDFLAGS = -no-undefined -export-dynamic -version-number \
+	0:@PNGLIB_RELEASE@:0 $(am__append_1) $(am__append_2)
 # -rpath is needed as automake doesn't know the directory
 libpng_la_LDFLAGS = -rpath '$(libdir)' -no-undefined -export-dynamic \
 	-version-number 2:@PNGLIB_RELEASE@:0
@@ -352,7 +351,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.51rc01.txt pngvcrd.c 
+	example.c libpng-1.0.51.txt pngvcrd.c
 
 CLEANFILES = pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
@@ -409,7 +408,7 @@
 stamp-h1: $(srcdir)/config.h.in $(top_builddir)/config.status
 	@rm -f stamp-h1
 	cd $(top_builddir) && $(SHELL) ./config.status config.h
-$(srcdir)/config.h.in: @MAINTAINER_MODE_TRUE@ $(am__configure_deps) 
+$(srcdir)/config.h.in: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 	($(am__cd) $(top_srcdir) && $(AUTOHEADER))
 	rm -f stamp-h1
 	touch $@
@@ -451,9 +450,9 @@
 	  echo "rm -f \"$${dir}/so_locations\""; \
 	  rm -f "$${dir}/so_locations"; \
 	done
-libpng.la: $(libpng_la_OBJECTS) $(libpng_la_DEPENDENCIES) 
+libpng.la: $(libpng_la_OBJECTS) $(libpng_la_DEPENDENCIES)
 	$(libpng_la_LINK)  $(libpng_la_OBJECTS) $(libpng_la_LIBADD) $(LIBS)
-libpng10.la: $(libpng10_la_OBJECTS) $(libpng10_la_DEPENDENCIES) 
+libpng10.la: $(libpng10_la_OBJECTS) $(libpng10_la_DEPENDENCIES)
 	$(libpng10_la_LINK) -rpath $(libdir) $(libpng10_la_OBJECTS) $(libpng10_la_LIBADD) $(LIBS)
 
 clean-checkPROGRAMS:
@@ -464,7 +463,7 @@
 	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
 	echo " rm -f" $$list; \
 	rm -f $$list
-pngtest$(EXEEXT): $(pngtest_OBJECTS) $(pngtest_DEPENDENCIES) 
+pngtest$(EXEEXT): $(pngtest_OBJECTS) $(pngtest_DEPENDENCIES)
 	@rm -f pngtest$(EXEEXT)
 	$(LINK) $(pngtest_OBJECTS) $(pngtest_LDADD) $(LIBS)
 install-binSCRIPTS: $(bin_SCRIPTS)
diff --git a/README b/README
index 2ff7fe6..79e1840 100644
--- a/README
+++ b/README
@@ -1,14 +1,14 @@
-README for libpng version 1.0.51rc01 - November 18, 2009 (shared library 10.0)
+README for libpng version 1.0.51 - December 3, 2009 (shared library 10.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
 
 Libpng comes in several distribution formats.  Get libpng-*.tar.gz,
-libpng-*.tar.lzma, or libpng-*.tar.bz2 if you want UNIX-style line
+libpng-*.tar.xz, or libpng-*.tar.bz2 if you want UNIX-style line
 endings in the text files, or lpng*.7z or lpng*.zip if you want DOS-style
 line endings.  You can get UNIX-style line endings from the *.zip file
 by using "unzip -a" but there seems to be no simple way to recover
-UNIX-style line endings from the *.7z file.  The *.tar.lzma file is
+UNIX-style line endings from the *.7z file.  The *.tar.xz file is
 recommended for *NIX users instead.
 
 Version 0.89 was the first official release of libpng.  Don't let the
@@ -58,9 +58,9 @@
 critical or an ancillary chunk.
 
 The changes made to the library, and bugs fixed are based on discussions
-on the png-mng-implement mailing list
-and not on material submitted privately to Guy, Andreas, or Glenn.  They will
-forward any good suggestions to the list.
+on the png-mng-implement mailing list and not on material submitted
+privately to Guy, Andreas, or Glenn.  They will forward any good
+suggestions to the list.
 
 For a detailed description on using libpng, read libpng.txt.  For
 examples of libpng in a program, see example.c and pngtest.c.  For usage
@@ -105,7 +105,8 @@
 fix.  Please mention "libpng" somewhere in the subject line.  Thanks.
 
 This release was created and will be supported by myself (of course
-based in a large way on Guy's and Andreas' earlier work), and the PNG group.
+based in a large way on Guy's and Andreas' earlier work), and the PNG
+development group.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit 
@@ -113,15 +114,14 @@
 to subscribe) or to glennrp at users.sourceforge.net
 
 You can't reach Guy, the original libpng author, at the addresses
-given in previous versions of this document.  He and Andreas will read mail
-addressed to the png-mng-implement list, however.
+given in previous versions of this document.  He and Andreas will
+read mail addressed to the png-mng-implement list, however.
 
 Please do not send general questions about PNG.  Send them to
 the (png-mng-misc at lists.sourceforge.net, subscription required, visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement to subscribe)
-On the other hand,
-please do not send libpng questions to that address, send them to me
-or to the png-mng-implement list.  I'll
+https://lists.sourceforge.net/lists/listinfo/png-mng-misc to
+subscribe). On the other hand, please do not send libpng questions to
+that address, send them to me or to the png-mng-implement list.  I'll
 get them in the end anyway.  If you have a question about something
 in the PNG specification that is related to using libpng, send it
 to me.  Send me any questions that start with "I was using libpng,
@@ -175,34 +175,41 @@
                             Greg Roelofs' "PNG: The Definitive Guide",
                             O'Reilly, 1999
        msvctest     =>  Builds and runs pngtest using a MSVC workspace
+       pngminim     =>  Simple pnm2pngm and png2pnmm programs
        pngminus     =>  Simple pnm2png and png2pnm programs
        pngsuite     =>  Test images
        visupng      =>  Contains a MSVC workspace for VisualPng
-      projects      =>  Contains project files and workspaces for building DLL
+      projects      =>  Contains project files and workspaces for
+                        building a DLL
        beos             =>  Contains a Beos workspace for building libpng
-       c5builder        =>  Contains a Borland workspace for building libpng
-                            and zlib
-       visualc6         =>  Contains a Microsoft Visual C++ (MSVC) workspace
-                            for building libpng and zlib
-       netware.txt      =>  Contains instructions for downloading a set of
-                            project files for building libpng and zlib on
-                            Netware.
-       wince.txt        =>  Contains instructions for downloading a Microsoft
-                            Visual C++ (Windows CD Toolkit) workspace for
-                            building libpng and zlib on WindowsCE
+       c5builder        =>  Contains a Borland workspace for building
+                            libpng and zlib
+       netware.txt      =>  Contains instructions for downloading a set
+                            of project files for building libpng and
+                            zlib on Netware.
+       visualc6         =>  Contains a Microsoft Visual C++ (MSVC)
+                            workspace for building libpng and zlib
+       wince.txt        =>  Contains instructions for downloading a
+                            Microsoft Visual C++ (Windows CD Toolkit)
+                            workspace for building libpng and zlib on
+                            WindowsCE
+       xcode            =>  Contains xcode project files
       scripts       =>  Directory containing scripts for building libpng:
        descrip.mms      =>  VMS makefile for MMS or MMK
-       makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
-       makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng10.so.0.1.0.51rc01)
-       makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.51rc01)
-       makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.51rc01,
-                            uses assembler code tuned for Intel MMX platform)
-       makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
-       makefile.knr     =>  Archaic UNIX Makefile that converts files with
-                            ansi2knr (Requires ansi2knr.c from
+       makefile.std     =>  Generic UNIX makefile (cc, creates static
+                            libpng.a)
+       makefile.elf     =>  Linux/ELF gcc makefile symbol versioning,
+                            creates libpng10.so.0.1.0.51)
+       makefile.linux   =>  Linux/ELF makefile (gcc, creates
+                            libpng10.so.0.1.0.51)
+       makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
+                            libpng10.so.0.1.0.51, previously
+                            used assembler code tuned for Intel MMX
+                            platform)
+       makefile.gcc     =>  Generic makefile (gcc, creates static
+                            libpng.a)
+       makefile.knr     =>  Archaic UNIX Makefile that converts files
+                            with ansi2knr (Requires ansi2knr.c from
                             ftp://ftp.cs.wisc.edu/ghost)
        makefile.aix     =>  AIX makefile
        makefile.cygwin  =>  Cygwin/gcc makefile
@@ -212,20 +219,21 @@
        makefile.hpgcc   =>  HPUX makefile using gcc
        makefile.hpux    =>  HPUX (10.20 and 11.00) makefile
        makefile.hp64    =>  HPUX (10.20 and 11.00) makefile, 64 bit
-       makefile.ibmc    =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)
+       makefile.ibmc    =>  IBM C/C++ version 3.x for Win32 and OS/2
+                            (static)
        makefile.intel   =>  Intel C/C++ version 4.0 and later
        libpng.icc       =>  Project file, IBM VisualAge/C++ 4.0 or later
-       makefile.netbsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
-       makefile.ne10bsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng10.so
+       makefile.netbsd  =>  NetBSD/cc makefile, makes libpng.so.
+       makefile.ne10bsd  =>  NetBSD/cc makefile, makes libpng10.so
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng10.so.0.1.0.51rc01)
+                            (gcc, creates libpng10.so.0.1.0.51)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng10.so.0.1.0.51rc01)
+                            (gcc, creates libpng10.so.0.1.0.51)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng10.so.0.1.0.51rc01)
+                            (gcc, creates libpng10.so.0.1.0.51)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
@@ -243,8 +251,8 @@
        makefile.dj2     =>  DJGPP 2 makefile
        makefile.msc     =>  Microsoft C makefile
        makefile.vcawin32=>  makefile for Microsoft Visual C++ 5.0 and
-                            later (uses assembler code tuned for Intel MMX
-                            platform)
+                            later (previously used assembler code tuned
+                            for Intel MMX platform)
        makefile.vcwin32 =>  makefile for Microsoft Visual C++ 4.0 and
                             later (does not use assembler code)
        makefile.os2     =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
diff --git a/Y2KINFO b/Y2KINFO
index 0d7f8b3..0e172a6 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      November 18, 2009
+      December 3, 2009
 
       Since the PNG Development group is an ad-hoc body, we can't make
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.0.51rc01 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.51 are Y2K compliant.  It is my belief that earlier
       versions were also Y2K compliant.
 
       Libpng only has three year fields.  One is a 2-byte unsigned integer
diff --git a/aclocal.m4 b/aclocal.m4
index 0dabd6b..27bc57c 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -13,8 +13,8 @@
 
 m4_ifndef([AC_AUTOCONF_VERSION],
   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
-m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.64],,
-[m4_warning([this file was generated for autoconf 2.64.
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.65],,
+[m4_warning([this file was generated for autoconf 2.65.
 You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically `autoreconf'.])])
@@ -7859,15 +7859,15 @@
 
 # Generated from ltversion.in.
 
-# serial 3012 ltversion.m4
+# serial 3017 ltversion.m4
 # This file is part of GNU Libtool
 
-m4_define([LT_PACKAGE_VERSION], [2.2.6])
-m4_define([LT_PACKAGE_REVISION], [1.3012])
+m4_define([LT_PACKAGE_VERSION], [2.2.6b])
+m4_define([LT_PACKAGE_REVISION], [1.3017])
 
 AC_DEFUN([LTVERSION_VERSION],
-[macro_version='2.2.6'
-macro_revision='1.3012'
+[macro_version='2.2.6b'
+macro_revision='1.3017'
 _LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?])
 _LT_DECL(, macro_revision, 0)
 ])
diff --git a/configure b/configure
index 3745cfd..8d26f86 100755
--- a/configure
+++ b/configure
@@ -1,12 +1,14 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.64 for libpng 1.0.51rc01.
+# Generated by GNU Autoconf 2.65 for libpng 1.0.51.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
+#
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
-# 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
-# Foundation, Inc.
+# 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
+# Inc.
+#
 #
 # This configure script is free software; the Free Software Foundation
 # gives unlimited permission to copy, distribute and modify it.
@@ -676,7 +678,8 @@
 
 
 
-exec 7<&0 </dev/null 6>&1
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
 
 # Name of the host.
 # hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
@@ -698,8 +701,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.0.51rc01'
-PACKAGE_STRING='libpng 1.0.51rc01'
+PACKAGE_VERSION='1.0.51'
+PACKAGE_STRING='libpng 1.0.51'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1432,7 +1435,7 @@
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng 1.0.51rc01 to adapt to many kinds of systems.
+\`configure' configures libpng 1.0.51 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1502,7 +1505,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.0.51rc01:";;
+     short | recursive ) echo "Configuration of libpng 1.0.51:";;
    esac
   cat <<\_ACEOF
 
@@ -1539,7 +1542,7 @@
   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
               nonstandard directory <lib dir>
   LIBS        libraries to pass to the linker, e.g. -l<library>
-  CPPFLAGS    C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
   CPP         C preprocessor
 
@@ -1609,8 +1612,8 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.0.51rc01
-generated by GNU Autoconf 2.64
+libpng configure 1.0.51
+generated by GNU Autoconf 2.65
 
 Copyright (C) 2009 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
@@ -1657,7 +1660,7 @@
 	ac_retval=1
 fi
   eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-  return $ac_retval
+  as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_compile
 
@@ -1694,7 +1697,7 @@
     ac_retval=1
 fi
   eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-  return $ac_retval
+  as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_cpp
 
@@ -1740,7 +1743,7 @@
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-  return $ac_retval
+  as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
 
@@ -1813,7 +1816,7 @@
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
-  return $ac_retval
+  as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_run
 
@@ -2034,8 +2037,8 @@
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.0.51rc01, which was
-generated by GNU Autoconf 2.64.  Invocation command line was
+It was created by libpng $as_me 1.0.51, which was
+generated by GNU Autoconf 2.65.  Invocation command line was
 
   $ $0 $@
 
@@ -2288,7 +2291,7 @@
 for ac_site_file in "$ac_site_file1" "$ac_site_file2"
 do
   test "x$ac_site_file" = xNONE && continue
-  if test -r "$ac_site_file"; then
+  if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
 $as_echo "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
@@ -2297,9 +2300,9 @@
 done
 
 if test -r "$cache_file"; then
-  # Some versions of bash will fail to source /dev/null (special
-  # files actually), so we avoid doing that.
-  if test -f "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
 $as_echo "$as_me: loading cache $cache_file" >&6;}
     case $cache_file in
@@ -2718,6 +2721,7 @@
 
 fi
 
+  test -d ./--version && rmdir ./--version
   if test "${ac_cv_path_mkdir+set}" = set; then
     MKDIR_P="$ac_cv_path_mkdir -p"
   else
@@ -2725,7 +2729,6 @@
     # value for MKDIR_P within a source directory, because that will
     # break other packages using the cache if that directory is
     # removed, or if the value is a relative name.
-    test -d ./--version && rmdir ./--version
     MKDIR_P="$ac_install_sh -d"
   fi
 fi
@@ -2842,7 +2845,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.0.51rc01'
+ VERSION='1.0.51'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2906,7 +2909,7 @@
 
 
 
-PNGLIB_VERSION=1.0.51rc01
+PNGLIB_VERSION=1.0.51
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
 PNGLIB_RELEASE=51
@@ -3239,32 +3242,30 @@
 ... rest of stderr output deleted ...
          10q' conftest.err >conftest.er1
     cat conftest.er1 >&5
-    rm -f conftest.er1 conftest.err
   fi
+  rm -f conftest.er1 conftest.err
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 done
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdio.h>
+
 int
 main ()
 {
-FILE *f = fopen ("conftest.out", "w");
- return ferror (f) || fclose (f) != 0;
 
   ;
   return 0;
 }
 _ACEOF
 ac_clean_files_save=$ac_clean_files
-ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out conftest.out"
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
 # Try to create an executable without -o first, disregard a.out.
 # It will help us diagnose broken compilers, and finding out an intuition
 # of exeext.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
-$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+$as_echo_n "checking whether the C compiler works... " >&6; }
 ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
 
 # The possible output files:
@@ -3326,10 +3327,10 @@
 else
   ac_file=''
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
-$as_echo "$ac_file" >&6; }
 if test -z "$ac_file"; then :
-  $as_echo "$as_me: failed program was:" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+$as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
@@ -3337,51 +3338,18 @@
 { as_fn_set_status 77
 as_fn_error "C compiler cannot create executables
 See \`config.log' for more details." "$LINENO" 5; }; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
 fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+$as_echo "$ac_file" >&6; }
 ac_exeext=$ac_cv_exeext
 
-# Check that the compiler produces executables we can run.  If not, either
-# the compiler is broken, or we cross compile.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
-$as_echo_n "checking whether the C compiler works... " >&6; }
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
-  if { ac_try='./$ac_file'
-  { { case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
-    cross_compiling=no
-  else
-    if test "$cross_compiling" = maybe; then
-	cross_compiling=yes
-    else
-	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error "cannot run C compiled programs.
-If you meant to cross compile, use \`--host'.
-See \`config.log' for more details." "$LINENO" 5; }
-    fi
-  fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out conftest.out
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
-# Check that the compiler produces executables we can run.  If not, either
-# the compiler is broken, or we cross compile.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
-$as_echo_n "checking whether we are cross compiling... " >&6; }
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
-$as_echo "$cross_compiling" >&6; }
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
 $as_echo_n "checking for suffix of executables... " >&6; }
 if { { ac_try="$ac_link"
@@ -3414,13 +3382,72 @@
 as_fn_error "cannot compute suffix of executables: cannot compile and link
 See \`config.log' for more details." "$LINENO" 5; }
 fi
-rm -f conftest$ac_cv_exeext
+rm -f conftest conftest$ac_cv_exeext
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
 $as_echo "$ac_cv_exeext" >&6; }
 
 rm -f conftest.$ac_ext
 EXEEXT=$ac_cv_exeext
 ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details." "$LINENO" 5; }
+    fi
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 $as_echo_n "checking for suffix of object files... " >&6; }
 if test "${ac_cv_objext+set}" = set; then :
@@ -4937,8 +4964,8 @@
 
 
 
-macro_version='2.2.6'
-macro_revision='1.3012'
+macro_version='2.2.6b'
+macro_revision='1.3017'
 
 
 
@@ -5128,13 +5155,13 @@
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:5131: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:5158: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:5134: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:5161: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:5137: output\"" >&5)
+  (eval echo "\"\$as_me:5164: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -6326,7 +6353,7 @@
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6329 "configure"' > conftest.$ac_ext
+  echo '#line 6356 "configure"' > conftest.$ac_ext
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7713,11 +7740,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7716: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7743: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7720: \$? = $ac_status" >&5
+   echo "$as_me:7747: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8052,11 +8079,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8055: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8082: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8059: \$? = $ac_status" >&5
+   echo "$as_me:8086: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8157,11 +8184,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8160: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8187: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8164: \$? = $ac_status" >&5
+   echo "$as_me:8191: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8212,11 +8239,11 @@
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8215: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8242: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8219: \$? = $ac_status" >&5
+   echo "$as_me:8246: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -10579,7 +10606,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10582 "configure"
+#line 10609 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10675,7 +10702,7 @@
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10678 "configure"
+#line 10705 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12047,8 +12074,8 @@
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.0.51rc01, which was
-generated by GNU Autoconf 2.64.  Invocation command line was
+This file was extended by libpng $as_me 1.0.51, which was
+generated by GNU Autoconf 2.65.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -12088,6 +12115,7 @@
 
   -h, --help       print this help, then exit
   -V, --version    print version number and configuration settings, then exit
+      --config     print configuration, then exit
   -q, --quiet, --silent
                    do not print progress messages
   -d, --debug      don't remove temporary files
@@ -12110,10 +12138,11 @@
 
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-libpng config.status 1.0.51rc01
-configured by $0, generated by GNU Autoconf 2.64,
-  with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
+libpng config.status 1.0.51
+configured by $0, generated by GNU Autoconf 2.65,
+  with options \\"\$ac_cs_config\\"
 
 Copyright (C) 2009 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
@@ -12151,6 +12180,8 @@
     ac_cs_recheck=: ;;
   --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
     $as_echo "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    $as_echo "$ac_cs_config"; exit ;;
   --debug | --debu | --deb | --de | --d | -d )
     debug=: ;;
   --file | --fil | --fi | --f )
@@ -12597,7 +12628,7 @@
 t delim
 :nl
 h
-s/\(.\{148\}\).*/\1/
+s/\(.\{148\}\)..*/\1/
 t more1
 s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
 p
@@ -12611,7 +12642,7 @@
 t nl
 :delim
 h
-s/\(.\{148\}\).*/\1/
+s/\(.\{148\}\)..*/\1/
 t more2
 s/["\\]/\\&/g; s/^/"/; s/$/"/
 p
diff --git a/configure.ac b/configure.ac
index 57fc84f..9cc06c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.0.51rc01], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.0.51], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.0.51rc01
+PNGLIB_VERSION=1.0.51
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
 PNGLIB_RELEASE=51
diff --git a/libpng-1.0.51rc01.txt b/libpng-1.0.51.txt
similarity index 99%
rename from libpng-1.0.51rc01.txt
rename to libpng-1.0.51.txt
index 7d4ef1c..de18de4 100644
--- a/libpng-1.0.51rc01.txt
+++ b/libpng-1.0.51.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.51rc01 - November 18, 2009
+ libpng version 1.0.51 - December 3, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.51rc01 - November 18, 2009
+ libpng versions 0.97, January 1998, through 1.0.51 - December 3, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -878,7 +878,7 @@
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.0.51rc01, not all possible expansions are supported.
+As of libpng version 1.0.51, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -3070,13 +3070,13 @@
 
 XIII. Y2K Compliance in libpng
 
-November 18, 2009
+December 3, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.51rc01 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.51 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
diff --git a/libpng.3 b/libpng.3
index 0c67b80..4363c92 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "November 18, 2009"
+.TH LIBPNG 3 "December 3, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51rc01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51
 .SH SYNOPSIS
 \fI\fB
 
@@ -821,7 +821,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.51rc01 - November 18, 2009
+ libpng version 1.0.51 - December 3, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -832,7 +832,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.51rc01 - November 18, 2009
+ libpng versions 0.97, January 1998, through 1.0.51 - December 3, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -1699,7 +1699,7 @@
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.0.51rc01, not all possible expansions are supported.
+As of libpng version 1.0.51, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -3891,13 +3891,13 @@
 
 .SH XIII. Y2K Compliance in libpng
 
-November 18, 2009
+December 3, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.51rc01 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.51 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -4183,7 +4183,9 @@
  1.0.50              10    10050  10.so.0.50[.0]
  1.2.41beta01-18     13    10241  12.so.0.41[.0]
  1.0.51rc01          10    10051  10.so.0.51[.0]
- 1.2.41rc01          13    10241  12.so.0.41[.0]
+ 1.2.41rc01-03       13    10241  12.so.0.41[.0]
+ 1.0.51              10    10051  10.so.0.51[.0]
+ 1.2.41              13    10241  12.so.0.41[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4239,7 +4241,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.51rc01 - November 18, 2009:
+Libpng version 1.0.51 - December 3, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4262,7 +4264,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.51rc01, November 18, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.51, December 3, 2009, are
 Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -4361,7 +4363,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-November 18, 2009
+December 3, 2009
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 1f2bc5f..31f0106 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "November 18, 2009"
+.TH LIBPNGPF 3 "December 3, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51rc01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/ltmain.sh b/ltmain.sh
index 4c5f420..a72f2fd 100644
--- a/ltmain.sh
+++ b/ltmain.sh
@@ -1,6 +1,6 @@
 # Generated from ltmain.m4sh.
 
-# ltmain.sh (GNU libtool) 2.2.6
+# ltmain.sh (GNU libtool) 2.2.6b
 # Written by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
 
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007 2008 Free Software Foundation, Inc.
@@ -65,7 +65,7 @@
 #       compiler:		$LTCC
 #       compiler flags:		$LTCFLAGS
 #       linker:		$LD (gnu? $with_gnu_ld)
-#       $progname:		(GNU libtool) 2.2.6
+#       $progname:		(GNU libtool) 2.2.6b
 #       automake:		$automake_version
 #       autoconf:		$autoconf_version
 #
@@ -73,9 +73,9 @@
 
 PROGRAM=ltmain.sh
 PACKAGE=libtool
-VERSION=2.2.6
+VERSION=2.2.6b
 TIMESTAMP=""
-package_revision=1.3012
+package_revision=1.3017
 
 # Be Bourne compatible
 if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
@@ -116,15 +116,15 @@
 
 : ${CP="cp -f"}
 : ${ECHO="echo"}
-: ${EGREP="/usr/bin/grep -E"}
-: ${FGREP="/usr/bin/grep -F"}
-: ${GREP="/usr/bin/grep"}
+: ${EGREP="/bin/grep -E"}
+: ${FGREP="/bin/grep -F"}
+: ${GREP="/bin/grep"}
 : ${LN_S="ln -s"}
 : ${MAKE="make"}
 : ${MKDIR="mkdir"}
 : ${MV="mv -f"}
 : ${RM="rm -f"}
-: ${SED="/opt/local/bin/gsed"}
+: ${SED="/bin/sed"}
 : ${SHELL="${CONFIG_SHELL-/bin/sh}"}
 : ${Xsed="$SED -e 1s/^X//"}
 
@@ -2560,7 +2560,7 @@
     ;;
   *ar\ archive*) # could be an import, or static
     if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null |
-       $EGREP 'file format (pe-i386(.*architecture: i386)?|pe-arm-wince)' >/dev/null ; then
+       $EGREP 'file format pe-i386(.*architecture: i386)?' >/dev/null ; then
       win32_nmres=`eval $NM -f posix -A $1 |
 	$SED -n -e '
 	    1,100{
diff --git a/png.5 b/png.5
index 4965e39..e7b17d4 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "November 18, 2009"
+.TH PNG 5 "December 3, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 93c61dc..97709aa 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -13,10 +13,11 @@
 
 #define PNG_INTERNAL
 #define PNG_NO_EXTERN
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_51rc01 Your_png_h_is_not_version_1_0_51rc01;
+typedef version_1_0_51 Your_png_h_is_not_version_1_0_51;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.
@@ -722,13 +723,13 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.0.51rc01 - November 18, 2009" PNG_STRING_NEWLINE \
+     "libpng version 1.0.51 - December 3, 2009" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.0.51rc01 - November 18, 2009\
+      return ((png_charp) "libpng version 1.0.51 - December 3, 2009\
       Copyright (c) 1998-2009 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
diff --git a/png.h b/png.h
index c9dc4d3..b11473a 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.51rc01 - November 18, 2009
+ * libpng version 1.0.51 - December 3, 2009
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -10,7 +10,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.0.51rc01 - November 18, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.51 - December 3, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -247,7 +247,9 @@
  *    1.2.40                  13    10240  12.so.0.40[.0]
  *    1.2.41beta01-18         13    10241  12.so.0.41[.0]
  *    1.0.51rc01              10    10051  10.so.0.51[.0]
- *    1.2.41rc01              13    10241  12.so.0.41[.0]
+ *    1.2.41rc01-03           13    10241  12.so.0.41[.0]
+ *    1.0.51                  10    10051  10.so.0.51[.0]
+ *    1.2.41                  13    10241  12.so.0.41[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -279,7 +281,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.0.51rc01, November 18, 2009, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.51, December 3, 2009, are
  * Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -391,13 +393,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    November 18, 2009
+ *    December 3, 2009
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.0.51rc01 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.51 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -453,9 +455,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.51rc01"
+#define PNG_LIBPNG_VER_STRING "1.0.51"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.51rc01 - November 18, 2009\n"
+   " libpng version 1.0.51 - December 3, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  10
@@ -468,7 +470,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  01
+#define PNG_LIBPNG_VER_BUILD  0
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -485,7 +487,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
@@ -1524,7 +1526,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_0_51rc01;
+typedef png_structp version_1_0_51;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index 91b823e..0cf3e28 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.0.51rc01 - November 18, 2009
+ * libpng version 1.0.51 - December 3, 2009
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1524,23 +1524,29 @@
 #  endif
 #endif
 
+#ifdef PNG_PEDANTIC_WARNINGS
+#  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
+#    define PNG_PEDANTIC_WARNINGS_SUPPORTED
+#  endif
+#endif
+
+#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
 /* Support for compiler specific function attributes.  These are used
  * so that where compiler support is available incorrect use of API
  * functions in png.h will generate compiler warnings.  Added at libpng
  * version 1.2.41.
  */
-#ifdef __GNUC__
-#  ifndef PNG_USE_RESULT
-#    define PNG_USE_RESULT __attribute__((__warn_unused_result__))
-#  endif
-#  ifndef PNG_NORETURN
-#    define PNG_NORETURN   __attribute__((__noreturn__))
-#  endif
-#  ifndef PNG_ALLOCATED
-#    define PNG_ALLOCATED  __attribute__((__malloc__))
-#  endif
+#  ifdef __GNUC__
+#    ifndef PNG_USE_RESULT
+#      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
+#    endif
+#    ifndef PNG_NORETURN
+#      define PNG_NORETURN   __attribute__((__noreturn__))
+#    endif
+#    ifndef PNG_ALLOCATED
+#      define PNG_ALLOCATED  __attribute__((__malloc__))
+#    endif
 
-#  ifndef PNG_CONFIGURE_LIBPNG
     /* This specifically protects structure members that should only be
      * accessed from within the library, therefore should be empty during
      * a library build.
@@ -1552,16 +1558,16 @@
 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
 #    endif
 #    ifndef PNG_PRIVATE
-#if 0 /* Doesn't work so we use deprecated instead*/
-#      define PNG_PRIVATE \
-        __attribute__((warning("This function is not exported by libpng.")))
-#else
-#      define PNG_PRIVATE \
-        __attribute__((__deprecated__))
-#endif
-#    endif
-#  endif
-#endif
+#      if 0 /* Doesn't work so we use deprecated instead*/
+#        define PNG_PRIVATE \
+          __attribute__((warning("This function is not exported by libpng.")))
+#      else
+#        define PNG_PRIVATE \
+          __attribute__((__deprecated__))
+#      endif
+#    endif /* PNG_PRIVATE */
+#  endif /* __GNUC__ */
+#endif /* PNG_PEDANTIC_WARNINGS */
 
 #ifndef PNG_DEPRECATED
 #  define PNG_DEPRECATED  /* Use of this function is deprecated */
diff --git a/pngerror.c b/pngerror.c
index e9a73ca..18de775 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -17,6 +17,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
diff --git a/pngget.c b/pngget.c
index 7c23be3..ae2c489 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -13,6 +13,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
diff --git a/pngmem.c b/pngmem.c
index 1a0a5b5..757dddd 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -18,6 +18,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
diff --git a/pngpread.c b/pngpread.c
index 239c04d..9d0d7db 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.38 [July 16, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -12,6 +12,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
 
diff --git a/pngread.c b/pngread.c
index 2230c74..700d794 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -15,6 +15,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_READ_SUPPORTED
 
diff --git a/pngrio.c b/pngrio.c
index 48b80ec..9ce0737 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -19,6 +19,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_READ_SUPPORTED
 
diff --git a/pngrtran.c b/pngrtran.c
index 606f6ef..198a93a 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -17,6 +17,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_READ_SUPPORTED
 
diff --git a/pngrutil.c b/pngrutil.c
index 8d3e68a..ec10f80 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -15,6 +15,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_READ_SUPPORTED
 
diff --git a/pngset.c b/pngset.c
index e342b91..b36a2ef 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -17,6 +17,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
diff --git a/pngtest.c b/pngtest.c
index 8511375..ec63c69 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -31,6 +31,7 @@
  * of files at once by typing "pngtest -m file1.png file2.png ..."
  */
 
+#define PNG_PEDANTIC_WARNINGS
 #include "png.h"
 
 #ifdef _WIN32_WCE
@@ -1689,4 +1690,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_51rc01 your_png_h_is_not_version_1_0_51rc01;
+typedef version_1_0_51 your_png_h_is_not_version_1_0_51;
diff --git a/pngtrans.c b/pngtrans.c
index c4bbecc..6ad9dcf 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -12,6 +12,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
diff --git a/pngwio.c b/pngwio.c
index 05e32be..5a4d04a 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -19,6 +19,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_WRITE_SUPPORTED
 
diff --git a/pngwrite.c b/pngwrite.c
index f8726eb..ddbff82 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -13,6 +13,7 @@
 
 /* Get internal access to png.h */
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_WRITE_SUPPORTED
 
diff --git a/pngwtran.c b/pngwtran.c
index 527d233..e5bd4a3 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -12,6 +12,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_WRITE_SUPPORTED
 
diff --git a/pngwutil.c b/pngwutil.c
index 80a45f7..3988447 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.41 [November 18, 2009]
+ * Last changed in libpng 1.2.41 [December 3, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -12,6 +12,7 @@
  */
 
 #define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
 #include "png.h"
 #ifdef PNG_WRITE_SUPPORTED
 
diff --git a/projects/visualc6/libpng.dsp b/projects/visualc6/libpng.dsp
index 59f5701..dca2e85 100644
--- a/projects/visualc6/libpng.dsp
+++ b/projects/visualc6/libpng.dsp
@@ -56,8 +56,8 @@
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -87,8 +87,8 @@
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG" /d PNG_DEBUG=1
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "_DEBUG" /d PNG_DEBUG=1
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -118,8 +118,8 @@
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG" /d PNG_LIBPNG_SPECIALBUILD=""""Use MMX instructions""""
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG" /d PNG_LIBPNG_SPECIALBUILD=""""Use MMX instructions""""
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -149,8 +149,8 @@
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG" /d PNG_DEBUG=1 /d PNG_LIBPNG_SPECIALBUILD=""""Use MMX instructions""""
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "_DEBUG" /d PNG_DEBUG=1 /d PNG_LIBPNG_SPECIALBUILD=""""Use MMX instructions""""
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -180,8 +180,8 @@
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG" /dPNG_LIBPNG_DLLFNAME_POSTFIX=""""VB"""" /dPNG_LIBPNG_SPECIALBUILD=""""__stdcall calling convention used for exported functions""""
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG" /dPNG_LIBPNG_DLLFNAME_POSTFIX=""""VB"""" /dPNG_LIBPNG_SPECIALBUILD=""""__stdcall calling convention used for exported functions""""
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -213,8 +213,8 @@
 # ADD CPP /nologo /MD /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "PNG_NO_MMX_CODE" /D "WIN32" /D "NDEBUG" /D "_CRT_SECURE_NO_WARNINGS" /FD /c
 # SUBTRACT CPP /YX /Yc /Yu
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -240,8 +240,8 @@
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "DEBUG" /D "PNG_NO_MMX_CODE" /D PNG_DEBUG=1 /D "_CRT_SECURE_NO_WARNINGS" /FD /GZ /c
 # SUBTRACT CPP /YX /Yc /Yu
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
-# ADD RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -267,8 +267,8 @@
 # ADD CPP /nologo /MD /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_USE_PNGVCRD" /D "PNG_LIBPNG_SPECIALBUILD" /D "_CRT_SECURE_NO_WARNINGS" /FD /c
 # SUBTRACT CPP /YX /Yc /Yu
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "PNG_CONFIGURE_LIBPNG" /d "NDEBUG"
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
@@ -294,8 +294,8 @@
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "DEBUG" /D PNG_DEBUG=1 /D "PNG_USE_PNGVCRD" /D "PNG_LIBPNG_SPECIALBUILD" /D "_CRT_SECURE_NO_WARNINGS" /FD /GZ /c
 # SUBTRACT CPP /YX /Yc /Yu
 RSC=rc.exe
-# ADD BASE RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
-# ADD RSC /l 0x409 /d "PNG_CONFIGURE_LIBPNG" /d "_DEBUG"
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
diff --git a/projects/visualc71/libpng.vcproj b/projects/visualc71/libpng.vcproj
index 2f27156..3a3d4cc 100644
--- a/projects/visualc71/libpng.vcproj
+++ b/projects/visualc71/libpng.vcproj
@@ -139,7 +139,7 @@
 				Name="VCPreLinkEventTool"/>
 			<Tool
 				Name="VCResourceCompilerTool"
-				AdditionalOptions="/d PNG_CONFIGURE_LIBPNG /d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;Use MMX instructions&quot;&quot;&quot;&quot;"
+				AdditionalOptions="/d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;Use MMX instructions&quot;&quot;&quot;&quot;"
 				PreprocessorDefinitions="NDEBUG;_CRT_SECURE_NO_WARNINGS"
 				Culture="1033"
 				AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/>
@@ -188,7 +188,7 @@
 				Name="VCPreLinkEventTool"/>
 			<Tool
 				Name="VCResourceCompilerTool"
-				AdditionalOptions="/d PNG_CONFIGURE_LIBPNG /d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;Use MMX instructions&quot;&quot;&quot;&quot;"
+				AdditionalOptions="/d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;Use MMX instructions&quot;&quot;&quot;&quot;"
 				PreprocessorDefinitions="_DEBUG,PNG_DEBUG=1;_CRT_SECURE_NO_WARNINGS"
 				Culture="1033"
 				AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/>
@@ -236,7 +236,7 @@
 				Name="VCPreLinkEventTool"/>
 			<Tool
 				Name="VCResourceCompilerTool"
-				AdditionalOptions="/d PNG_CONFIGURE_LIBPNG /d PNG_LIBPNG_DLLFNAME_POSTFIX=&quot;&quot;&quot;&quot;VB&quot;&quot;&quot;&quot; /d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;__stdcall calling convention used for exported functions&quot;&quot;&quot;&quot;"
+				AdditionalOptions="/d PNG_LIBPNG_DLLFNAME_POSTFIX=&quot;&quot;&quot;&quot;VB&quot;&quot;&quot;&quot; /d PNG_LIBPNG_SPECIALBUILD=&quot;&quot;&quot;&quot;__stdcall calling convention used for exported functions&quot;&quot;&quot;&quot;"
 				PreprocessorDefinitions="NDEBUG;_CRT_SECURE_NO_WARNINGS"
 				Culture="1033"
 				AdditionalIncludeDirectories="..\..;..\..\..\zlib;$(IntDir)"/>
diff --git a/projects/wince.txt b/projects/wince.txt
index d9c8712..2f8ec0c 100644
--- a/projects/wince.txt
+++ b/projects/wince.txt
@@ -1,6 +1,6 @@
 A set of project files is available for WinCE.  Get
-libpng-1.0.51rc01-project-wince.zip from a libpng distribution
+libpng-1.0.51-project-wince.zip from a libpng distribution
 site such as http://libpng.sourceforge.net/index.html
 
 Put the zip file in this directory (projects) and then run
-"unzip -a libpng-1.0.51rc01-project-wince.zip"
+"unzip -a libpng-1.0.51-project-wince.zip"
diff --git a/scripts/README.txt b/scripts/README.txt
index e1ba3e2..b1eba9d 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,8 +1,8 @@
 
-Makefiles for  libpng version 1.0.51rc01 - November 18, 2009
+Makefiles for  libpng version 1.0.51 - December 3, 2009
 
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng10.so.0.1.0.51rc01)
+                       (gcc, creates libpng10.so.0.1.0.51)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@
  makefile.dec      =>  DEC Alpha UNIX makefile
  makefile.dj2      =>  DJGPP 2 makefile
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng10.so.0.1.0.51rc01)
+                       gcc, creates libpng10.so.0.1.0.51)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.gccmmx   =>  Generic gcc makefile previously using MMX code
@@ -38,14 +38,14 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng10.so.0.1.0.51rc01)
+                       creates libpng10.so.0.1.0.51)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.51rc01)
+                       creates libpng10.so.0.1.0.51)
  makefile.solaris-x86  =>  Solaris 2.X makefile (gcc, no MMX code,
-                       creates libpng10.so.0.1.0.51rc01)
+                       creates libpng10.so.0.1.0.51)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng10.so.0.1.0.51rc01)
+                       creates libpng10.so.0.1.0.51)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index c299588..ae49cfa 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.0.51rc01
+version=1.0.51
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 4366a26..e5274d3 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.51rc01
+Version: 1.0.51
 Libs: -L${libdir} -lpng10
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index 8157f6d..de21173 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -49,7 +49,7 @@
 WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) $(SUN_CC_FLAGS) \
+CFLAGS=-I$(ZLIBINC) $(SUN_CC_FLAGS) \
 	# $(WARNMORE) -g -DPNG_DEBUG=5
 LDFLAGS=$(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) libpng.a -lz -lm
 
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 4731963..f5391d9 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -49,7 +49,7 @@
 WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) $(SUN_CC_FLAGS) \
+CFLAGS=-I$(ZLIBINC) $(SUN_CC_FLAGS) \
 	# $(WARNMORE) -g -DPNG_DEBUG=5
 LDFLAGS=-L. -R. $(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng10 -lz -lm
 
diff --git a/scripts/makefile.acorn b/scripts/makefile.acorn
index e2630d7..a0e577b 100644
--- a/scripts/makefile.acorn
+++ b/scripts/makefile.acorn
@@ -2,7 +2,7 @@
 
 
 # Toolflags:
-CCflags = -DPNG_CONFIGURE_LIBPNG -c -depend !Depend -IC:,Zlib: -g -throwback  -DRISCOS  -fnah
+CCflags = -c -depend !Depend -IC:,Zlib: -g -throwback  -DRISCOS  -fnah
 C++flags = -c -depend !Depend -IC: -throwback
 Linkflags = -aif -c++ -o $@
 ObjAsmflags = -throwback -NoCache -depend !Depend
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index caced50..d6ba818 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -23,7 +23,7 @@
 
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
@@ -48,7 +48,7 @@
 CRELEASE = -O2
 LDRELEASE = -s
 WARNMORE=-W -Wall
-CFLAGS = -DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) $(WARNMORE) $(CRELEASE)
+CFLAGS = -I$(ZLIBINC) $(WARNMORE) $(CRELEASE)
 LDFLAGS = -L. -L$(ZLIBLIB) -lpng10 -lz -lm $(LDRELEASE)
 
 # File extensions
diff --git a/scripts/makefile.amiga b/scripts/makefile.amiga
index 6a64260..8bf0f45 100644
--- a/scripts/makefile.amiga
+++ b/scripts/makefile.amiga
@@ -15,7 +15,7 @@
 #compiler flags
 # WARNING: a bug in V6.51 causes bad code with OPTGO
 #          So use V6.55 or set NOOPTGO!!!!!!!!!
-CFLAGS= -DPNG_CONFIGURE_LIBPNG NOSTKCHK PARMS=REG OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL\
+CFLAGS= NOSTKCHK PARMS=REG OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL\
 	OPTLOOP OPTRDEP=4 OPTDEP=4 OPTCOMP=4 INCLUDEDIR=$(ZLIB) \
 	DEFINE=PNG_INTERNAL
 #linker flags
diff --git a/scripts/makefile.atari b/scripts/makefile.atari
index d265524..0e1ca72 100644
--- a/scripts/makefile.atari
+++ b/scripts/makefile.atari
@@ -9,7 +9,7 @@
 # Modified for LC56/ATARI assumes libz.lib is in same dir and uses default
 # rules for library management
 #
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I..\zlib -O
+CFLAGS=-I..\zlib -O
 LBR = png.lib
 LDFLAGS=-lpng -lz -lm
 
diff --git a/scripts/makefile.bc32 b/scripts/makefile.bc32
index 82dd080..4b96231 100644
--- a/scripts/makefile.bc32
+++ b/scripts/makefile.bc32
@@ -43,7 +43,7 @@
 # -d  merge duplicate strings
 # -k- turn off standard stack frame
 # -w  display all warnings
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIB_DIR) -O2 -d -k- -w $(TARGET_CPU) $(CDEBUG)
+CFLAGS=-I$(ZLIB_DIR) -O2 -d -k- -w $(TARGET_CPU) $(CDEBUG)
 
 # -M  generate map file
 LDFLAGS=-L$(ZLIB_DIR) -M $(LDEBUG)
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 5b460d2..e91ec0a 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -44,7 +44,7 @@
 
 # On BeOS, -O1 is actually better than -O3.  This is a known bug but it's
 # still here in R4.5
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O1 -funroll-loops \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O1 -funroll-loops \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
 # LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz
 LDFLAGS=-L. -Wl,-soname=$(LIBSOMAJ) -L$(ZLIBLIB) -lz
diff --git a/scripts/makefile.bor b/scripts/makefile.bor
index fd54504..e803184 100644
--- a/scripts/makefile.bor
+++ b/scripts/makefile.bor
@@ -51,7 +51,7 @@
 # -w  set all warnings on
 # -O2 optimize for speed
 # -Z  global optimization
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -O2 -Z -X- -w -I$(ZLIB_DIR) -$(TARGET_CPU) $(MODEL_ARG) $(CDEBUG)
+CFLAGS=-O2 -Z -X- -w -I$(ZLIB_DIR) -$(TARGET_CPU) $(MODEL_ARG) $(CDEBUG)
 
 # -M  generate map file
 LDFLAGS=-M -L$(ZLIB_DIR) $(MODEL_ARG) $(LDEBUG)
diff --git a/scripts/makefile.cegcc b/scripts/makefile.cegcc
index be780e7..1fe5260 100644
--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -64,7 +64,7 @@
 
 compilation:
 	@echo " * Compilation of $(PACKAGE)"
-	cd $(PACKAGE) && CPPFLAGS="$(CPPFLAGS) -DPNG_BUILD_DLL -DPNG_CONSOLE_IO_SUPPORTED -DPNG_NO_MMX_CODE -D_WIN32_WCE=0x0420" CFLAGS="$(CFLAGS) -DPNG_CONFIGURE_LIBPNG -mms-bitfields -O3 -pipe -fomit-frame-pointer" LDFLAGS="$(LDFLAGS) -Wl,--enable-auto-import -Wl,-s" ./configure --prefix=/opt/wince --host=arm-mingw32ce && make
+	cd $(PACKAGE) && CPPFLAGS="$(CPPFLAGS) -DPNG_BUILD_DLL -DPNG_CONSOLE_IO_SUPPORTED -DPNG_NO_MMX_CODE -D_WIN32_WCE=0x0420" CFLAGS="$(CFLAGS) -mms-bitfields -O3 -pipe -fomit-frame-pointer" LDFLAGS="$(LDFLAGS) -Wl,--enable-auto-import -Wl,-s" ./configure --prefix=/opt/wince --host=arm-mingw32ce && make
 
 copy:
 	@echo " * Copy of binary and development files"
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index bdf59da..57cdb6a 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -36,7 +36,7 @@
 
 CC=gcc
 ifdef MINGW
-MINGW_CCFLAGS=-DPNG_CONFIGURE_LIBPNG -mno-cygwin -I/usr/include/mingw
+MINGW_CCFLAGS=-mno-cygwin -I/usr/include/mingw
 MINGW_LDFLAGS=-mno-cygwin -L/usr/lib/mingw
 endif
 
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 CYGDLL = 10
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index 591d7c3..088251a 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -22,7 +22,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 10
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -41,7 +41,7 @@
 RANLIB=ranlib
 RM_F=/bin/rm -f
 
-# CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE
+# CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE
 CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O -funroll-loops
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng10 -lz
 
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index 3ead62f..a9a5d65 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
@@ -57,7 +57,7 @@
 ZLIBLIB=../zlib
 ZLIBINC=../zlib
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -std -w1 -I$(ZLIBINC) -O # -g -DPNG_DEBUG=1
+CFLAGS=-std -w1 -I$(ZLIBINC) -O # -g -DPNG_DEBUG=1
 LDFLAGS=-L$(ZLIBLIB) -rpath $(ZLIBLIB) libpng.a -lz -lm
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
diff --git a/scripts/makefile.dj2 b/scripts/makefile.dj2
index f37ec96..b8457ee 100644
--- a/scripts/makefile.dj2
+++ b/scripts/makefile.dj2
@@ -13,7 +13,7 @@
 LIBPATH=$(prefix)/lib
 
 CC=gcc
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I../zlib -O
+CFLAGS=-I../zlib -O
 LDFLAGS=-L. -L../zlib/ -lpng -lz -lm
 
 RANLIB=ranlib
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index 52b5926..e32bfaf 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -57,7 +57,7 @@
 
 # for pgcc version 2.95.1, -O3 is buggy; don't use it.
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -W -Wall -D_REENTRANT -O2 \
+CFLAGS=-W -Wall -D_REENTRANT -O2 \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
 
 LDFLAGS=-L. -lpng10
diff --git a/scripts/makefile.freebsd b/scripts/makefile.freebsd
index 5b31465..daf91bd 100644
--- a/scripts/makefile.freebsd
+++ b/scripts/makefile.freebsd
@@ -27,7 +27,7 @@
 LDADD+=         -lm -lz
 DPADD+=         ${LIBM} ${LIBZ}
 
-CFLAGS+= -DPNG_CONFIGURE_LIBPNG -I.
+CFLAGS+= -I.
 .if (${MACHINE_ARCH} != "i386")
 CFLAGS+= -DPNG_CONFIGURE_LIBPNG -DPNG_NO_MMX_CODE
 .endif
diff --git a/scripts/makefile.gcc b/scripts/makefile.gcc
index 2eff467..ed7cd86 100644
--- a/scripts/makefile.gcc
+++ b/scripts/makefile.gcc
@@ -22,8 +22,8 @@
 LDDEBUG =
 CRELEASE = -O2
 LDRELEASE = -s
-#CFLAGS = -DPNG_CONFIGURE_LIBPNG -W -Wall $(CDEBUG)
-CFLAGS = -DPNG_CONFIGURE_LIBPNG -W -Wall $(CRELEASE)
+#CFLAGS = -W -Wall $(CDEBUG)
+CFLAGS = -W -Wall $(CRELEASE)
 #LDFLAGS = $(LDDEBUG)
 LDFLAGS = $(LDRELEASE)
 LIBS = -lz -lm
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index af71641..1f69ca2 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -17,7 +17,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index befa767..cf6002c 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -14,14 +14,14 @@
 # Note that if you plan to build a libpng shared library, zlib must also
 # be a shared library, which zlib's configure does not do.  After running
 # zlib's configure, edit the appropriate lines of makefile to read:
-#   CFLAGS=-DPNG_CONFIGURE_LIBPNG -O1 -DHAVE_UNISTD -DUSE_MAP -fPIC \
+#   CFLAGS=-O1 -DHAVE_UNISTD -DUSE_MAP -fPIC \
 #   LDSHARED=ld -b
 #   SHAREDLIB=libz.sl
 
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -40,10 +40,10 @@
 RANLIB=ranlib
 RM_F=/bin/rm -f
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O -Ae -Wl,+vnocompatwarnings +DD64 \
+CFLAGS=-I$(ZLIBINC) -O -Ae -Wl,+vnocompatwarnings +DD64 \
 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 +Z -DHAVE_UNISTD_H -DUSE_MMAP
 # Caution: be sure you have built zlib with the same CFLAGS.
-CCFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O -Ae -Wl,+vnocompatwarnings +DD64 \
+CCFLAGS=-I$(ZLIBINC) -O -Ae -Wl,+vnocompatwarnings +DD64 \
 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 +Z -DHAVE_UNISTD_H -DUSE_MMAP
 
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index 8cee42a..b24df8c 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -56,7 +56,7 @@
 
 # for pgcc version 2.95.1, -O3 is buggy; don't use it.
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
 #LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng10 -lz -lm
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng10 -lz -lm
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index b620549..9081517 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -48,9 +48,9 @@
 MANPATH=$(prefix)/man
 BINPATH=$(exec_prefix)/bin
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0 -DPNG_NO_MMX_CODE
+CFLAGS=-I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0 -DPNG_NO_MMX_CODE
 # Caution: be sure you have built zlib with the same CFLAGS.
-CCFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0
+CCFLAGS=-I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 
 # override DESTDIR= on the make install command line to easily support
diff --git a/scripts/makefile.ibmc b/scripts/makefile.ibmc
index 8d02a83..3d540d2 100644
--- a/scripts/makefile.ibmc
+++ b/scripts/makefile.ibmc
@@ -23,7 +23,7 @@
 AR = ilib
 RM = del
 
-CFLAGS = -DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -Mc -O2 -W3
+CFLAGS = -I$(ZLIBINC) -Mc -O2 -W3
 LDFLAGS =
 
 # File extensions
diff --git a/scripts/makefile.intel b/scripts/makefile.intel
index 79f34ed..3b1cdde 100644
--- a/scripts/makefile.intel
+++ b/scripts/makefile.intel
@@ -32,7 +32,7 @@
 # --------------------------------------------------------------------------
 
 CC=icl -c
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -O2 -G$(CPU)$(CALLING) -Qip -Qunroll4 -I$(ZLIBINC) -nologo
+CFLAGS=-O2 -G$(CPU)$(CALLING) -Qip -Qunroll4 -I$(ZLIBINC) -nologo
 LD=link
 LDFLAGS=/SUBSYSTEM:CONSOLE /NOLOGO
 
diff --git a/scripts/makefile.knr b/scripts/makefile.knr
index 7545319..3a20674 100644
--- a/scripts/makefile.knr
+++ b/scripts/makefile.knr
@@ -27,7 +27,7 @@
 DESTDIR=
 
 CC=cc
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I../zlib -O
+CFLAGS=-I../zlib -O
 LDFLAGS=-L. -L../zlib/ -lpng -lz -lm
 # flags for ansi2knr
 ANSI2KNRFLAGS=
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index a5fb737..ab4ab55 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -51,7 +51,7 @@
 
 # for pgcc version 2.95.1, -O3 is buggy; don't use it.
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
 
 LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng10 -lz -lm
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 8338fd2..9e89338 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -62,22 +62,22 @@
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
 
 ### if you don't need thread safety, but want the asm accel
-#CFLAGS= -DPNG_CONFIGURE_LIBPNG $(strip $(MINGW_CCFLAGS) -DPNG_THREAD_UNSAFE_OK \
+#CFLAGS= $(strip $(MINGW_CCFLAGS) -DPNG_THREAD_UNSAFE_OK \
 #	$(addprefix -I,$(ZLIBINC)) -W -Wall -O $(ALIGN) -funroll-loops \
 #	-fomit-frame-pointer)  # $(WARNMORE) -g -DPNG_DEBUG=5
 ### if you need thread safety and want (minimal) asm accel
-#CFLAGS= -DPNG_CONFIGURE_LIBPNG $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
+#CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 #	-W -Wall -O $(ALIGN) -funroll-loops \
 #	-fomit-frame-pointer)  # $(WARNMORE) -g -DPNG_DEBUG=5
 ### Normal (non-asm) compilation
-CFLAGS= -DPNG_CONFIGURE_LIBPNG $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
+CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
         -W -Wall -O3 $(ALIGN) -funroll-loops -DPNG_NO_MMX_CODE \
 	-fomit-frame-pointer) # $(WARNMORE) -g -DPNG_DEBUG=5
 
 LIBNAME = libpng10
 PNGMAJ = 0
 MINGDLL = 10
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.mips b/scripts/makefile.mips
index 8765066..2c7082d 100644
--- a/scripts/makefile.mips
+++ b/scripts/makefile.mips
@@ -22,8 +22,8 @@
 DESTDIR=
 
 CC=cc
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I../zlib -O -systype sysv -DSYSV -w -Dmips
-#CFLAGS=-DPNG_CONFIGURE_LIBPNG -O
+CFLAGS=-I../zlib -O -systype sysv -DSYSV -w -Dmips
+#CFLAGS=-O
 LDFLAGS=-L. -L../zlib/ -lpng -lz -lm
 
 #RANLIB=ranlib
diff --git a/scripts/makefile.msc b/scripts/makefile.msc
index d5a9ba1..df9e84d 100644
--- a/scripts/makefile.msc
+++ b/scripts/makefile.msc
@@ -10,7 +10,7 @@
 
 # -------- Microsoft C 5.1 and later, does not use assembler code --------
 MODEL=L
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -Oait -Gs -nologo -W3 -A$(MODEL) -I..\zlib
+CFLAGS=-Oait -Gs -nologo -W3 -A$(MODEL) -I..\zlib
 #-Ox generates bad code with MSC 5.1
 CC=cl
 LD=link
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 0719225..c06ba0b 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png10
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.51rc01
+SHLIB_MINOR=	1.0.51
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
@@ -29,10 +29,10 @@
 # We should be able to do something like this instead of the manual
 # uncommenting, but it core dumps for me at the moment:
 # .if ${MACHINE_ARCH} == "i386"
-#   CPPFLAGS+=-DPNG_CONFIGURE_LIBPNG -DPNG_THREAD_UNSAFE_OK
+#   CPPFLAGS+=-DPNG_THREAD_UNSAFE_OK
 #   MKLINT= no
 # .else
-    CPPFLAGS+=-DPNG_CONFIGURE_LIBPNG -DPNG_NO_MMX_CODE
+    CPPFLAGS+=-DPNG_NO_MMX_CODE
 # .endif
 
 CLEANFILES+=pngtest.o pngtest
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index 3da4b8a..fa275ed 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.0.51rc01
+SHLIB_MINOR=	1.0.51
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
@@ -29,10 +29,10 @@
 # We should be able to do something like this instead of the manual
 # uncommenting, but it core dumps for me at the moment:
 # .if ${MACHINE_ARCH} == "i386"
-#   CPPFLAGS+=-DPNG_CONFIGURE_LIBPNG -DPNG_THREAD_UNSAFE_OK
+#   CPPFLAGS+=-DPNG_THREAD_UNSAFE_OK
 #   MKLINT= no
 # .else
-    CPPFLAGS+=-DPNG_CONFIGURE_LIBPNG -DPNG_NO_MMX_CODE
+    CPPFLAGS+=-DPNG_NO_MMX_CODE
 # .endif
 
 CLEANFILES+=pngtest.o pngtest
diff --git a/scripts/makefile.nommx b/scripts/makefile.nommx
index 8e82d74..3577cab 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -51,7 +51,7 @@
 
 # for pgcc version 2.95.1, -O3 is buggy; don't use it.
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
 
 LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng10 -lz -lm
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index d71b65e..4f97bc4 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.51rc01
+SHLIB_MINOR=	1.0.51
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
@@ -20,7 +20,7 @@
 
 HDRS=	png.h pngconf.h
 
-CFLAGS+= -DPNG_CONFIGURE_LIBPNG -W -Wall
+CFLAGS+= -W -Wall
 CPPFLAGS+= -I${.CURDIR} -DPNG_NO_MMX_CODE
 
 NOPROFILE= Yes
diff --git a/scripts/makefile.os2 b/scripts/makefile.os2
index e190c0a..907cfc8 100644
--- a/scripts/makefile.os2
+++ b/scripts/makefile.os2
@@ -15,7 +15,7 @@
 WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
-CFLAGS=--DPNG_CONFIGURE_LIBPNG I$(ZLIBINC) -W -Wall -O6 -funroll-loops -malign-loops=2 \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O6 -funroll-loops -malign-loops=2 \
 	-malign-functions=2 #$(WARNMORE) -g -DPNG_DEBUG=5
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lzdll -Zcrtdll
 AR=emxomfar
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index 508003d..51bf48d 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -41,7 +41,7 @@
 ZLIBLIB=../zlib
 ZLIBINC=../zlib
 
-CFLAGS= -DPNG_CONFIGURE_LIBPNG -dy -belf -I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE
+CFLAGS= -dy -belf -I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng10 -lz -lm
 
 INCPATH=$(prefix)/include/libpng
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index ff67aa1..7e3bf47 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -47,7 +47,7 @@
 ABI=
 
 WARNMORE= # -g -DPNG_DEBUG=5
-CFLAGS=-DPNG_CONFIGURE_LIBPNG $(ABI) -I$(ZLIBINC) -O $(WARNMORE) -fPIC -mabi=n32 -DPNG_NO_MMX_CODE
+CFLAGS=$(ABI) -I$(ZLIBINC) -O $(WARNMORE) -fPIC -mabi=n32 -DPNG_NO_MMX_CODE
 LDFLAGS=$(ABI) -L. -L$(ZLIBLIB) -lpng -lz -lm
 LDSHARED=cc $(ABI) -shared -soname $(LIBSOMAJ) \
   -set_version sgi$(PNGMAJ).0
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index f9a309f..ad495a6 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -48,8 +48,8 @@
 
 WARNMORE=-fullwarn
 # Note: -KPIC is the default anyhow
-#CFLAGS= -DPNG_CONFIGURE_LIBPNG $(ABI) -I$(ZLIBINC) -O $(WARNMORE) -KPIC -DPNG_NO_MMX_CODE # -g -DPNG_DEBUG=5
-CFLAGS=-DPNG_CONFIGURE_LIBPNG $(ABI) -I$(ZLIBINC) -O $(WARNMORE) -DPNG_NO_MMX_CODE
+#CFLAGS= $(ABI) -I$(ZLIBINC) -O $(WARNMORE) -KPIC -DPNG_NO_MMX_CODE # -g -DPNG_DEBUG=5
+CFLAGS=$(ABI) -I$(ZLIBINC) -O $(WARNMORE) -DPNG_NO_MMX_CODE
 LDFLAGS_A=$(ABI) -L. -L$(ZLIBLIB) -lpng10 -lz -lm
 LDFLAGS=$(ABI) -L. -L$(ZLIBLIB) -lpng -lz -lm
 LDSHARED=cc $(ABI) -shared -soname $(LIBSOMAJ) \
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index a53008e..d702d3f 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -11,7 +11,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
@@ -50,8 +50,8 @@
 #WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
-#CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O3 $(WARNMORE) -g -DPNG_DEBUG=5 -DPNG_NO_MMX_CODE
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE
+#CFLAGS=-I$(ZLIBINC) -W -Wall -O3 $(WARNMORE) -g -DPNG_DEBUG=5 -DPNG_NO_MMX_CODE
+CFLAGS=-I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE
 LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng10 -lz -lm
 
 INCPATH=$(prefix)/include
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index b9baef3..d7492c3 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -46,7 +46,7 @@
 WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O -DPNG_NO_MMX_CODE; \
+CFLAGS=-I$(ZLIBINC) -W -Wall -O -DPNG_NO_MMX_CODE; \
 	# $(WARNMORE) -g -DPNG_DEBUG=5
 LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng10 -lz -lm
 
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index a81e353..106af25 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51rc01
+PNGMIN = 1.0.51
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.std b/scripts/makefile.std
index abbf9b9..262d153 100644
--- a/scripts/makefile.std
+++ b/scripts/makefile.std
@@ -34,7 +34,7 @@
 RANLIB=ranlib
 RM_F=rm -f
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O # -g -DPNG_DEBUG=5
+CFLAGS=-I$(ZLIBINC) -O # -g -DPNG_DEBUG=5
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
diff --git a/scripts/makefile.sunos b/scripts/makefile.sunos
index 7feb04c..0cef4fc 100644
--- a/scripts/makefile.sunos
+++ b/scripts/makefile.sunos
@@ -39,7 +39,7 @@
 RANLIB=ranlib
 RM_F=/bin/rm -f
 
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -O # $(WARNMORE) -DPNG_DEBUG=5
+CFLAGS=-I$(ZLIBINC) -O # $(WARNMORE) -DPNG_DEBUG=5
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
diff --git a/scripts/makefile.tc3 b/scripts/makefile.tc3
index 951af0d..21435a6 100644
--- a/scripts/makefile.tc3
+++ b/scripts/makefile.tc3
@@ -6,8 +6,8 @@
 # ----- Turbo C 3.00 (can be modified to work with earlier versions) -----
 
 MODEL=l
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -O2 -Z -m$(MODEL) -I..\zlib
-#CFLAGS=-DPNG_CONFIGURE_LIBPNG -D_NO_PROTO -O2 -Z -m$(MODEL) -I..\zlib  # Turbo C older than 3.00
+CFLAGS=-O2 -Z -m$(MODEL) -I..\zlib
+#CFLAGS=-D_NO_PROTO -O2 -Z -m$(MODEL) -I..\zlib  # Turbo C older than 3.00
 CC=tcc
 LD=tcc
 LIB=tlib
diff --git a/scripts/makefile.vcawin32 b/scripts/makefile.vcawin32
index 533cb29..1b58300 100644
--- a/scripts/makefile.vcawin32
+++ b/scripts/makefile.vcawin32
@@ -16,7 +16,7 @@
 CC = cl
 LD = link
 AR = lib
-CFLAGS  = -DPNG_CONFIGURE_LIBPNG -nologo -DPNG_USE_PNGVCRD -MD -O2 -W3 -I..\zlib
+CFLAGS  = -nologo -DPNG_USE_PNGVCRD -MD -O2 -W3 -I..\zlib
 LDFLAGS = -nologo
 ARFLAGS = -nologo
 RM = del
diff --git a/scripts/makefile.vcwin32 b/scripts/makefile.vcwin32
index 38e834a..3cdfb39 100644
--- a/scripts/makefile.vcwin32
+++ b/scripts/makefile.vcwin32
@@ -16,7 +16,7 @@
 CC = cl
 LD = link
 AR = lib
-CFLAGS  = -DPNG_CONFIGURE_LIBPNG -nologo -DPNG_NO_MMX_CODE -MD -O2 -W3 -I..\zlib
+CFLAGS  = -nologo -DPNG_NO_MMX_CODE -MD -O2 -W3 -I..\zlib
 LDFLAGS = -nologo
 ARFLAGS = -nologo
 RM = del
diff --git a/scripts/makefile.watcom b/scripts/makefile.watcom
index bff6ebc..4a8c7d7 100644
--- a/scripts/makefile.watcom
+++ b/scripts/makefile.watcom
@@ -36,7 +36,7 @@
 
 
 CC=wcc386
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -$(CPU)$(CALLING) -fp$(CPU) -fpi87 -oneatx -mf -bt=$(OS) -i=$(ZLIBINC) -zq
+CFLAGS=-$(CPU)$(CALLING) -fp$(CPU) -fpi87 -oneatx -mf -bt=$(OS) -i=$(ZLIBINC) -zq
 LD=wcl386
 LDFLAGS=-zq
 
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index 7a895b8..b1db268 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -5,7 +5,7 @@
 LIBRARY lpngce
 
 EXPORTS
-;Version 1.0.51rc01
+;Version 1.0.51
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index ed73ad1..b1d400e 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.0.51rc01
+; Version 1.0.51
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index 2f0b0be..e6b7287 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.0.51rc01
+;Version 1.0.51
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3