diff --git a/ANNOUNCE b/ANNOUNCE
index ab7b188..f6758c3 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,90 +1,71 @@
 
-Libpng 1.0.51 - December 3, 2009
+Libpng 1.0.52rc01 - December 23, 2009
 
-This is a public release of libpng, intended for use in production codes.
+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.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.0.51.tar.xz (LZMA-compressed, recommended)
-   libpng-1.0.51.tar.gz
-   libpng-1.0.51.tar.bz2
+   libpng-1.0.52rc01.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.52rc01.tar.gz
+   libpng-1.0.52rc01.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   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
+   libpng-1.0.52rc01-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.52rc01-no-config.tar.gz
+   libpng-1.0.52rc01-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1051.zip
-   lpng1051.7z
-   lpng1051.tar.bz2
+   lp1052r01.zip
+   lp1052r01.7z
+   lp1052r01.tar.bz2
 
 Project files
 
-   libpng-1.0.51-project-netware.zip
-   libpng-1.0.51-project-wince.zip
+   libpng-1.0.52rc01-project-netware.zip
+   libpng-1.0.52rc01-project-wince.zip
 
 Other information:
 
-   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
+   libpng-1.0.52rc01-README.txt
+   libpng-1.0.52rc01-KNOWNBUGS.txt
+   libpng-1.0.52rc01-LICENSE.txt
+   libpng-1.0.52rc01-Y2K-compliance.txt
+   libpng-1.0.52rc01-[previous version]-diff.txt
 
-Changes since the last public release (1.0.50):
+Changes since the last public release (1.0.51):
 
-version 1.0.51 [December 3, 2009]
+version 1.2.42beta01 [December 4, 2009]
+  Removed "#define PNG_NO_ERROR_NUMBERS" that was inadvertently added
+    to pngconf.h in version 1.2.41.
+  Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
+    to put png.h and pngconf.h in $prefix/include, like the other scripts,
+    instead of in $prefix/include/libpng.  Also revised makefile.sco
+    to put them in $prefix/include/libpng%NN% instead of in
+    $prefix/include/libpng/libpng%NN%.
+  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from scripts/makefile.darwin
 
-  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
-  Added "xcode" project similar one already in libpng-1.4.0beta (Alam Arias).
-  Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
-  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.
-  Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
-  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.
-  Removed a harmless extra png_set_invert_alpha() from pngwrite.c
-  Bugfixes and improvements to CMakeLists.txt (Philip Lowman)
-  Moved CMakeLists.txt from scripts into the main libpng directory.
-  Patched ltmain.sh for wince support.
-  Added PNG_CONVERT_tIME_SUPPORTED macro.
-  Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
-  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).
-  Removed three direct references to read_info_ptr members in pngtest.c
-    that were detected by the new PNG_DEPSTRUCT macro.
-  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
-  Marked nonexported functions with PNG_PRIVATE macro.
-  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.
+version 1.2.42beta02 [December 11, 2009]
+  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
+  Relocated png_do_chop() to its original position in pngrtran.c. The
+    change in version 1.2.41beta08 caused transparency to be handled wrong
+    in some 16-bit datastreams (Yusaku Sugai).
+
+version 1.2.42rc01 [December 17, 2009]
+  No changes.
+
+version 1.2.42rc02 [December 22, 2009]
+  Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
+    (revising changes made in 1.2.41beta17 and 1.2.41rc01)
+
+version 1.0.52 and 1.2.42 [December 23, 2009]
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
diff --git a/CHANGES b/CHANGES
index 0bb5810..a3bc769 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2591,9 +2591,34 @@
   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]
+version 1.2.41 and 1.0.51 [December 3, 2009]
   Updated the list of files and made some cosmetic changes in README.
 
+version 1.2.42beta01 [December 4, 2009]
+  Removed "#define PNG_NO_ERROR_NUMBERS" that was inadvertently added
+    to pngconf.h in version 1.2.41.
+  Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
+    to put png.h and pngconf.h in $prefix/include, like the other scripts,
+    instead of in $prefix/include/libpng.  Also revised makefile.sco
+    to put them in $prefix/include/libpng10 instead of in
+    $prefix/include/libpng/libpng10.
+  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from scripts/makefile.darwin
+
+version 1.2.42beta02 [December 11, 2009]
+  Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
+  Relocated png_do_chop() to its original position in pngrtran.c. The
+    change in version 1.2.41beta08 caused transparency to be handled wrong
+    in some 16-bit datastreams (Yusaku Sugai).
+
+version 1.2.42rc01 [December 17, 2009]
+  No changes.
+
+version 1.2.42rc02 [December 22, 2009]
+  Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
+    (revising changes made in 1.2.41beta17 and 1.2.41rc01)
+
+version 1.0.52 and 1.2.42 [December 23, 2009]
+
 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 441e311..3290a05 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.51 - December 3, 2009
+Installing libpng version 1.0.52rc01 - December 23, 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-1.0.51" or "libpng10" and "zlib-1.2.3"
+might be called "libpng-1.0.52rc01" 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:
@@ -62,7 +62,7 @@
              configure.ac, configure, Makefile.am, Makefile.in,
 %12-%             autogen.sh, config.guess, ltmain.sh, missing,
 %12-%             aclocal.m4, config.h.in, config.sub,
-%14+%             autogen.sh, config.guess, ltmain.sh, missing, libpng-pc.in,
+%14+%             autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in,
 %14+%             libpng-config.in, aclocal.m4, config.h.in, config.sub,
              depcomp, install-sh, mkinstalldirs, test-pngtest.sh
           contrib
diff --git a/KNOWNBUG b/KNOWNBUG
index fc1a5c5..2854876 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,17 +1,24 @@
 
-Known bugs in libpng version 1.0.51
+Known bugs in libpng version 1.0.52rc01
 
-1. February 23, 2006: The custom makefiles don't build libpng with -lz.
+1. December 4, 2009: The PNG_NO_ERROR_NUMBERS macro was inadvertently
+   defined in libpng-1.2.41/pngconf.h, which may cause a problem with
+   building a binary-compatible library.
+
+   STATUS: This will be fixed in libpng-1.2.42.  In the meantime, simply
+   delete the definition from line :
+
+2. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
    STATUS: This is a subject of debate. The change will probably be made
    as a part of a major overhaul of the makefiles in libpng version 1.4.0.
 
-2. February 24, 2006: The Makefile generated by the "configure" script
+3. February 24, 2006: The Makefile generated by the "configure" script
    fails to install symbolic links
    libpng12.so => libpng12.so.0.1.2.9betaN
    that are generated by the custom makefiles.
 
-3. September 4, 2007:  There is a report that pngtest crashes on MacOS 10.
+4. September 4, 2007:  There is a report that pngtest crashes on MacOS 10.
 
    STATUS: workarounds are
       1) Compile without optimization (crashes are observed with
diff --git a/LICENSE b/LICENSE
index ea2ff94..bc0b7d2 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 1.0.51, December 3, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.52rc01, December 23, 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
-December 3, 2009
+December 23, 2009
diff --git a/Makefile.am b/Makefile.am
index 49bef27..bf6f0ae 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,7 +86,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.51.txt pngvcrd.c
+	example.c libpng-1.0.52rc01.txt pngvcrd.c
 
 CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 3691d0f..6220cb2 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -351,7 +351,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.51.txt pngvcrd.c
+	example.c libpng-1.0.52rc01.txt pngvcrd.c
 
 CLEANFILES = pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index 79e1840..ff51c4a 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.0.51 - December 3, 2009 (shared library 10.0)
+README for libpng version 1.0.52rc01 - December 23, 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.
@@ -199,11 +199,11 @@
        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)
+                            creates libpng10.so.0.1.0.52rc01)
        makefile.linux   =>  Linux/ELF makefile (gcc, creates
-                            libpng10.so.0.1.0.51)
+                            libpng10.so.0.1.0.52rc01)
        makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
-                            libpng10.so.0.1.0.51, previously
+                            libpng10.so.0.1.0.52rc01, previously
                             used assembler code tuned for Intel MMX
                             platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static
@@ -228,12 +228,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng10.so.0.1.0.51)
+                            (gcc, creates libpng10.so.0.1.0.52rc01)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng10.so.0.1.0.51)
+                            (gcc, creates libpng10.so.0.1.0.52rc01)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng10.so.0.1.0.51)
+                            (gcc, creates libpng10.so.0.1.0.52rc01)
        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
diff --git a/Y2KINFO b/Y2KINFO
index 0e172a6..c1d2215 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      December 3, 2009
+      December 23, 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 1.0.51 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.52rc01 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/configure b/configure
index 8d26f86..1062fd8 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.65 for libpng 1.0.51.
+# Generated by GNU Autoconf 2.65 for libpng 1.0.52rc01.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -701,8 +701,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.0.51'
-PACKAGE_STRING='libpng 1.0.51'
+PACKAGE_VERSION='1.0.52rc01'
+PACKAGE_STRING='libpng 1.0.52rc01'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1435,7 +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 1.0.51 to adapt to many kinds of systems.
+\`configure' configures libpng 1.0.52rc01 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1505,7 +1505,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.0.51:";;
+     short | recursive ) echo "Configuration of libpng 1.0.52rc01:";;
    esac
   cat <<\_ACEOF
 
@@ -1612,7 +1612,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.0.51
+libpng configure 1.0.52rc01
 generated by GNU Autoconf 2.65
 
 Copyright (C) 2009 Free Software Foundation, Inc.
@@ -2037,7 +2037,7 @@
 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 1.0.51, which was
+It was created by libpng $as_me 1.0.52rc01, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   $ $0 $@
@@ -2845,7 +2845,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.0.51'
+ VERSION='1.0.52rc01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2909,10 +2909,10 @@
 
 
 
-PNGLIB_VERSION=1.0.51
+PNGLIB_VERSION=1.0.52rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=51
+PNGLIB_RELEASE=52
 
 
 
@@ -12074,7 +12074,7 @@
 # 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 1.0.51, which was
+This file was extended by libpng $as_me 1.0.52rc01, which was
 generated by GNU Autoconf 2.65.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -12140,7 +12140,7 @@
 cat >>$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 1.0.51
+libpng config.status 1.0.52rc01
 configured by $0, generated by GNU Autoconf 2.65,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 9cc06c0..cd3d6dd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,15 +18,15 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.0.51], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.0.52rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.0.51
+PNGLIB_VERSION=1.0.52rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=51
+PNGLIB_RELEASE=52
 
 dnl End of version number stuff
 
diff --git a/libpng-1.0.51.txt b/libpng-1.0.52rc01.txt
similarity index 99%
rename from libpng-1.0.51.txt
rename to libpng-1.0.52rc01.txt
index de18de4..f918ca6 100644
--- a/libpng-1.0.51.txt
+++ b/libpng-1.0.52rc01.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.51 - December 3, 2009
+ libpng version 1.0.52rc01 - December 23, 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 1.0.51 - December 3, 2009
+ libpng versions 0.97, January 1998, through 1.0.52rc01 - December 23, 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 1.0.51, not all possible expansions are supported.
+As of libpng version 1.0.52rc01, 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
@@ -3066,17 +3066,19 @@
 
 We do not use the TAB character for indentation in the C sources.
 
+Lines do not exceed 80 characters.
+
 Other rules can be inferred by inspecting the libpng source.
 
 XIII. Y2K Compliance in libpng
 
-December 3, 2009
+December 23, 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 1.0.51 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.52rc01 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 4363c92..84c84df 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "December 3, 2009"
+.TH LIBPNG 3 "December 23, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.52rc01
 .SH SYNOPSIS
 \fI\fB
 
@@ -821,7 +821,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.51 - December 3, 2009
+ libpng version 1.0.52rc01 - December 23, 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 1.0.51 - December 3, 2009
+ libpng versions 0.97, January 1998, through 1.0.52rc01 - December 23, 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 1.0.51, not all possible expansions are supported.
+As of libpng version 1.0.52rc01, 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
@@ -3887,17 +3887,19 @@
 
 We do not use the TAB character for indentation in the C sources.
 
+Lines do not exceed 80 characters.
+
 Other rules can be inferred by inspecting the libpng source.
 
 .SH XIII. Y2K Compliance in libpng
 
-December 3, 2009
+December 23, 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 1.0.51 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.52rc01 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
@@ -4186,6 +4188,10 @@
  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]
+ 1.2.42beta01-02     13    10242  12.so.0.42[.0]
+ 1.2.42rc01-02       13    10242  12.so.0.42[.0]
+ 1.0.52              10    10052  10.so.0.52[.0]
+ 1.2.42              13    10242  12.so.0.42[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4241,7 +4247,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.51 - December 3, 2009:
+Libpng version 1.0.52rc01 - December 23, 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).
 
@@ -4264,7 +4270,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.51, December 3, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.52rc01, December 23, 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
@@ -4363,7 +4369,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-December 3, 2009
+December 23, 2009
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 31f0106..28b237c 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "December 3, 2009"
+.TH LIBPNGPF 3 "December 23, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.51
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.52rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index e7b17d4..4405dba 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "December 3, 2009"
+.TH PNG 5 "December 23, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 97709aa..980773b 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
@@ -17,7 +17,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_51 Your_png_h_is_not_version_1_0_51;
+typedef version_1_0_52rc01 Your_png_h_is_not_version_1_0_52rc01;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.
@@ -723,13 +723,13 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.0.51 - December 3, 2009" PNG_STRING_NEWLINE \
+     "libpng version 1.0.52rc01 - December 23, 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 1.0.51 - December 3, 2009\
+      return ((png_charp) "libpng version 1.0.52rc01 - December 23, 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 b11473a..58728a6 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.51 - December 3, 2009
+ * libpng version 1.0.52rc01 - December 23, 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 1.0.51 - December 3, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.52rc01 - December 23, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -250,6 +250,10 @@
  *    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]
+ *    1.2.42beta01-02         13    10242  12.so.0.42[.0]
+ *    1.2.42rc01-02           13    10242  12.so.0.42[.0]
+ *    1.0.52                  10    10052  10.so.0.52[.0]
+ *    1.2.42                  13    10242  12.so.0.42[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -281,7 +285,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.0.51, December 3, 2009, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.52rc01, December 23, 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:
@@ -393,13 +397,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 3, 2009
+ *    December 23, 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 1.0.51 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.52rc01 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
@@ -455,9 +459,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.51"
+#define PNG_LIBPNG_VER_STRING "1.0.52rc01"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.51 - December 3, 2009\n"
+   " libpng version 1.0.52rc01 - December 23, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  10
@@ -465,12 +469,12 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   0
-#define PNG_LIBPNG_VER_RELEASE 51
+#define PNG_LIBPNG_VER_RELEASE 52
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -487,7 +491,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
@@ -495,7 +499,7 @@
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
-#define PNG_LIBPNG_VER 10051 /* 1.0.51 */
+#define PNG_LIBPNG_VER 10052 /* 1.0.52 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* Include the compression library's header */
@@ -1526,7 +1530,7 @@
 /* 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_51;
+typedef png_structp version_1_0_52rc01;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index 0cf3e28..437e184 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.0.51 - December 3, 2009
+ * libpng version 1.0.52rc01 - December 23, 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.)
@@ -758,7 +758,6 @@
 
 #endif /* PNG_WRITE_SUPPORTED */
 
-#define PNG_NO_ERROR_NUMBERS
 #ifndef PNG_1_0_X
 #  ifndef PNG_NO_ERROR_NUMBERS
 #    define PNG_ERROR_NUMBERS_SUPPORTED
diff --git a/pngerror.c b/pngerror.c
index 18de775..d4522af 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngget.c b/pngget.c
index ae2c489..4814b02 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngmem.c b/pngmem.c
index 757dddd..26c6ec2 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngpread.c b/pngpread.c
index 9d0d7db..83bad1d 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngread.c b/pngread.c
index 700d794..f6f5ac4 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngrio.c b/pngrio.c
index 9ce0737..7453373 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngrtran.c b/pngrtran.c
index 198a93a..9805c39 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
@@ -1437,11 +1437,6 @@
       png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
 #endif
 
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-   if (png_ptr->transformations & PNG_16_TO_8)
-      png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
-#endif
-
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
    if ((png_ptr->transformations & PNG_BACKGROUND) &&
       ((png_ptr->num_trans != 0 ) ||
@@ -1471,6 +1466,11 @@
           png_ptr->gamma_shift);
 #endif
 
+#ifdef PNG_READ_16_TO_8_SUPPORTED
+   if (png_ptr->transformations & PNG_16_TO_8)
+      png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1);
+#endif
+
 #ifdef PNG_READ_DITHER_SUPPORTED
    if (png_ptr->transformations & PNG_DITHER)
    {
diff --git a/pngrutil.c b/pngrutil.c
index ec10f80..8726387 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngset.c b/pngset.c
index b36a2ef..dcc3973 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngtest.c b/pngtest.c
index ec63c69..1c62690 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
@@ -1690,4 +1690,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_51 your_png_h_is_not_version_1_0_51;
+typedef version_1_0_52rc01 your_png_h_is_not_version_1_0_52rc01;
diff --git a/pngtrans.c b/pngtrans.c
index 6ad9dcf..17d7ccc 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngwio.c b/pngwio.c
index 5a4d04a..bf0d4e4 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngwrite.c b/pngwrite.c
index ddbff82..b0da051 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngwtran.c b/pngwtran.c
index e5bd4a3..a1bc3ad 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/pngwutil.c b/pngwutil.c
index 3988447..831d8e6 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 [December 3, 2009]
+ * Last changed in libpng 1.2.41 [December 23, 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.)
diff --git a/projects/wince.txt b/projects/wince.txt
index 2f8ec0c..e66bd2e 100644
--- a/projects/wince.txt
+++ b/projects/wince.txt
@@ -1,6 +1,6 @@
 A set of project files is available for WinCE.  Get
-libpng-1.0.51-project-wince.zip from a libpng distribution
+libpng-1.0.52rc01-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-1.0.51-project-wince.zip"
+"unzip -a libpng-1.0.52rc01-project-wince.zip"
diff --git a/scripts/README.txt b/scripts/README.txt
index b1eba9d..2a02f49 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,8 +1,8 @@
 
-Makefiles for  libpng version 1.0.51 - December 3, 2009
+Makefiles for  libpng version 1.0.52rc01 - December 23, 2009
 
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng10.so.0.1.0.51)
+                       (gcc, creates libpng10.so.0.1.0.52rc01)
  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.0.1.0.51)
+                       gcc, creates libpng10.so.0.1.0.52rc01)
  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.0.1.0.51)
+                       creates libpng10.so.0.1.0.52rc01)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.51)
+                       creates libpng10.so.0.1.0.52rc01)
  makefile.solaris-x86  =>  Solaris 2.X makefile (gcc, no MMX code,
-                       creates libpng10.so.0.1.0.51)
+                       creates libpng10.so.0.1.0.52rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng10.so.0.1.0.51)
+                       creates libpng10.so.0.1.0.52rc01)
  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 ae49cfa..0e334d5 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.0.51
+version=1.0.52rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index e5274d3..0a596f0 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.51
+Version: 1.0.52rc01
 Libs: -L${libdir} -lpng10
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index de21173..fb2e073 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index f5391d9..c286b23 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index d6ba818..4514eb2 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -23,7 +23,7 @@
 
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index e91ec0a..54ed626 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cegcc b/scripts/makefile.cegcc
index 1fe5260..5247ca6 100644
--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -23,7 +23,7 @@
 
 VERMAJ = 1
 VERMIN = 0
-VERMIC = 51
+VERMIC = 52
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index 57cdb6a..86e0fbf 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 CYGDLL = 10
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index 088251a..be9c31d 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -22,7 +22,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 10
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -42,7 +42,7 @@
 RM_F=/bin/rm -f
 
 # CFLAGS=-I$(ZLIBINC) -W -Wall -O3 -funroll-loops -DPNG_NO_MMX_CODE
-CFLAGS=-DPNG_CONFIGURE_LIBPNG -I$(ZLIBINC) -W -Wall -O -funroll-loops
+CFLAGS=-I$(ZLIBINC) -W -Wall -O -funroll-loops
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng10 -lz
 
 INCPATH=$(prefix)/include
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index a9a5d65..6ba3693 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index e32bfaf..8bd2ff6 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index 1f69ca2..9d69c09 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -17,7 +17,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index cf6002c..81b00e9 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index b24df8c..1ea5815 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index 9081517..9a1c653 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -21,7 +21,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index ab4ab55..111ed83 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 9e89338..bbe2ebd 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -77,7 +77,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 MINGDLL = 10
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index c06ba0b..f0f5b03 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png10
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.51
+SHLIB_MINOR=	1.0.52rc01
 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
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index fa275ed..1224ca5 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -2,22 +2,22 @@
 # make obj && make depend && make && make test
 # make includes && make install
 # Copyright (C) 2002 Patrick R.L. Welche
-# Copyright (C) 2007, 2009 Glenn Randers-Pehrson
+# Copyright (C) 2007-2009 Glenn Randers-Pehrson
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer
 # and license in png.h
 
-# You should also run makefile.ne0bsd
+# You should also run makefile.ne10bsd
 
 LOCALBASE?=/usr/local
 LIBDIR=	${LOCALBASE}/lib
 MANDIR= ${LOCALBASE}/man
-INCSDIR=${LOCALBASE}/include/libpng
+INCSDIR=${LOCALBASE}/include
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.0.51
+SHLIB_MINOR=	1.0.52rc01
 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
diff --git a/scripts/makefile.nommx b/scripts/makefile.nommx
index 3577cab..536d1a4 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 4f97bc4..ec681b3 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -1,6 +1,6 @@
 # makefile for libpng
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
-# Copyright (C) 2007-2008 Glenn Randers-Pehrson
+# Copyright (C) 2007-2009 Glenn Randers-Pehrson
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.51
+SHLIB_MINOR=	1.0.52rc01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
@@ -42,7 +42,7 @@
 
 beforeinstall:
 	if [ ! -d ${DESTDIR}${PREFIX}/include/libpng ]; then \
-	  ${INSTALL} -d -o root -g wheel ${DESTDIR}${PREFIX}/include/libpng; \
+	  ${INSTALL} -d -o root -g wheel ${DESTDIR}${PREFIX}/include; \
 	fi
 	if [ ! -d ${DESTDIR}${LIBDIR} ]; then \
 	  ${INSTALL} -d -o root -g wheel ${DESTDIR}${LIBDIR}; \
@@ -67,7 +67,7 @@
 	@rm -f ${DESTDIR}${PREFIX}/include/pngconf.h
 	@rmdir ${DESTDIR}${LIBDIR}/debug 2>/dev/null || true
 	${INSTALL} ${INSTALL_COPY} -o ${SHAREOWN} -g ${SHAREGRP} \
-		-m ${NONBINMODE} ${HDRS} ${DESTDIR}${PREFIX}/include/libpng
+		-m ${NONBINMODE} ${HDRS} ${DESTDIR}${PREFIX}/include
 	${INSTALL} ${INSTALL_COPY} -o ${SHAREOWN} -g ${SHAREGRP} \
 		-m ${NONBINMODE} ${HDRS} ${DESTDIR}${PREFIX}/include
 	${INSTALL} ${INSTALL_COPY} -o ${SHAREOWN} -g ${SHAREGRP} \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index 51bf48d..27802d2 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
@@ -44,7 +44,7 @@
 CFLAGS= -dy -belf -I$(ZLIBINC) -O3 -DPNG_NO_MMX_CODE
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng10 -lz -lm
 
-INCPATH=$(prefix)/include/libpng
+INCPATH=$(prefix)/include
 LIBPATH=$(exec_prefix)/lib
 MANPATH=$(prefix)/man
 BINPATH=$(exec_prefix)/bin
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index 7e3bf47..804068f 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index ad495a6..fb95eaf 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index d702d3f..e097cad 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -11,7 +11,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index d7492c3..003074b 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index 106af25..77dba17 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -11,7 +11,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.51
+PNGMIN = 1.0.52rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index b1db268..186e41d 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -5,7 +5,7 @@
 LIBRARY lpngce
 
 EXPORTS
-;Version 1.0.51
+;Version 1.0.52rc01
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index b1d400e..90f4034 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.0.51
+; Version 1.0.52rc01
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index e6b7287..0e285dc 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.0.51
+;Version 1.0.52rc01
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3