diff --git a/ANNOUNCE b/ANNOUNCE
index bbc7cb5..3e24abd 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.9beta02 - February 11, 2012
+Libpng 1.5.9rc01 - February 17, 2012
 
 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.
@@ -9,30 +9,35 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.5.9beta02.tar.xz (LZMA-compressed, recommended)
-   1.5.9beta02.tar.gz
-   1.5.9beta02.tar.bz2
+   1.5.9rc01.tar.xz (LZMA-compressed, recommended)
+   1.5.9rc01.tar.gz
+   1.5.9rc01.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp159b02.7z  (LZMA-compressed, recommended)
-   lp159b02.zip
+   lp159r01.7z  (LZMA-compressed, recommended)
+   lp159r01.zip
 
 Other information:
 
-   1.5.9beta02-README.txt
-   1.5.9beta02-LICENSE.txt
+   1.5.9rc01-README.txt
+   1.5.9rc01-LICENSE.txt
 
 Changes since the last public release (1.5.8):
 
 Version 1.5.9beta01 [February 3, 2012]
   Rebuilt configure scripts in the tar distributions.
 
-Version 1.5.9beta02 [February 11, 2012]
+Version 1.5.9beta02 [February 16, 2012]
   Removed two unused definitions from scripts/pnglibconf.h.prebuilt
   Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
-  Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED in pngstruct.h
+  Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
+
+Version 1.5.9rc01 [February 17, 2012]
+  Fixed CVE-2011-3026 buffer overrun bug.  Deal more correctly with the test
+    on iCCP chunk length. Also removed spurious casts that may hide problems
+    on 16-bit systems.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 4b6062d..b7bc51e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3797,10 +3797,15 @@
 Version 1.5.9beta01 [February 3, 2012]
   Rebuilt configure scripts in the tar distributions.
 
-Version 1.5.9beta02 [February 11, 2012]
+Version 1.5.9beta02 [February 16, 2012]
   Removed two unused definitions from scripts/pnglibconf.h.prebuilt
   Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
-  Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED in pngstruct.h
+  Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
+
+Version 1.5.9rc01 [February 17, 2012]
+  Fixed CVE-2011-3026 buffer overrun bug.  Deal more correctly with the test
+    on iCCP chunk length. Also removed spurious casts that may hide problems
+    on 16-bit systems.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7e4f0ad..8ee50b6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -229,7 +229,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 15.${PNGLIB_RELEASE}.1.5.9beta01
+#   VERSION 15.${PNGLIB_RELEASE}.1.5.9rc01
     VERSION 15.${PNGLIB_RELEASE}.0
     SOVERSION 15
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/LICENSE b/LICENSE
index e3ec99c..f4a0eda 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 1.5.9beta01, February 3, 2012, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.9rc01, February 17, 2012, are
 Copyright (c) 2004, 2006-2011 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
-February 3, 2012
+February 17, 2012
diff --git a/README b/README
index 3f21044..96f9f1b 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.9beta01 - February 3, 2012 (shared library 15.0)
+README for libpng version 1.5.9rc01 - February 17, 2012 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/configure b/configure
index 6ea74d5..bd745ec 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.68 for libpng 1.5.9beta01.
+# Generated by GNU Autoconf 2.68 for libpng 1.5.9rc01.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -570,8 +570,8 @@
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.5.9beta01'
-PACKAGE_STRING='libpng 1.5.9beta01'
+PACKAGE_VERSION='1.5.9rc01'
+PACKAGE_STRING='libpng 1.5.9rc01'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1321,7 +1321,7 @@
   # 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 1.5.9beta01 to adapt to many kinds of systems.
+\`configure' configures libpng 1.5.9rc01 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1391,7 +1391,7 @@
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.5.9beta01:";;
+     short | recursive ) echo "Configuration of libpng 1.5.9rc01:";;
    esac
   cat <<\_ACEOF
 
@@ -1502,7 +1502,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.5.9beta01
+libpng configure 1.5.9rc01
 generated by GNU Autoconf 2.68
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -1925,7 +1925,7 @@
 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 1.5.9beta01, which was
+It was created by libpng $as_me 1.5.9rc01, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   $ $0 $@
@@ -2740,7 +2740,7 @@
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.5.9beta01'
+ VERSION='1.5.9rc01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2804,7 +2804,7 @@
 
 
 
-PNGLIB_VERSION=1.5.9beta01
+PNGLIB_VERSION=1.5.9rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=9
@@ -13417,7 +13417,7 @@
 # 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 1.5.9beta01, which was
+This file was extended by libpng $as_me 1.5.9rc01, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13483,7 +13483,7 @@
 cat >>$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 1.5.9beta01
+libpng config.status 1.5.9rc01
 configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 466fb1e..ac2f386 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.5.9beta01], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.5.9rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.5.9beta01
+PNGLIB_VERSION=1.5.9rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=9
diff --git a/depcomp b/depcomp
old mode 100644
new mode 100755
diff --git a/libpng-manual.txt b/libpng-manual.txt
index f5592f9..f7add1f 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.9beta01 - February 3, 2012
+ libpng version 1.5.9rc01 - February 17, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.9beta01 - February 3, 2012
+ libpng versions 0.97, January 1998, through 1.5.9rc01 - February 17, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -4573,13 +4573,13 @@
 
 XIV. Y2K Compliance in libpng
 
-February 3, 2012
+February 17, 2012
 
 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 1.5.9beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.9rc01 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 d51c3e6..bc5169f 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "February 3, 2012"
+.TH LIBPNG 3 "February 17, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9rc01
 .SH SYNOPSIS
 \fI\fB
 
@@ -977,7 +977,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.9beta01 - February 3, 2012
+ libpng version 1.5.9rc01 - February 17, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -988,7 +988,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.9beta01 - February 3, 2012
+ libpng versions 0.97, January 1998, through 1.5.9rc01 - February 17, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -5551,13 +5551,13 @@
 
 .SH XIV. Y2K Compliance in libpng
 
-February 3, 2012
+February 17, 2012
 
 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 1.5.9beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.9rc01 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
@@ -5765,7 +5765,8 @@
  1.5.8beta01         15    10508  15.so.15.8[.0]
  1.5.8rc01           15    10508  15.so.15.8[.0]
  1.5.8               15    10508  15.so.15.8[.0]
- 1.5.9beta01         15    10509  15.so.15.9[.0]
+ 1.5.9beta01-02      15    10509  15.so.15.9[.0]
+ 1.5.9rc01           15    10509  15.so.15.9[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -5822,7 +5823,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.9beta01 - February 3, 2012:
+Libpng version 1.5.9rc01 - February 17, 2012:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5845,7 +5846,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.9beta01, February 3, 2012, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.9rc01, February 17, 2012, are
 Copyright (c) 2004,2006-2007 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
@@ -5944,7 +5945,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 3, 2012
+February 17, 2012
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index fcafce4..c95e2aa 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "February 3, 2012"
+.TH LIBPNGPF 3 "February 17, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.9rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
diff --git a/png.5 b/png.5
index c60b578..8d8c6a1 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "February 3, 2012"
+.TH PNG 5 "February 17, 2012"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index af5bfb3..babb8b8 100644
--- a/png.c
+++ b/png.c
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_9beta01 Your_png_h_is_not_version_1_5_9beta01;
+typedef png_libpng_version_1_5_9rc01 Your_png_h_is_not_version_1_5_9rc01;
 
 /* Tells libpng that we have already handled the first "num_bytes" bytes
  * of the PNG file signature.  If the PNG data is embedded into another
@@ -655,13 +655,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.9beta01 - February 3, 2012" PNG_STRING_NEWLINE \
+     "libpng version 1.5.9rc01 - February 17, 2012" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2011 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 "libpng version 1.5.9beta01 - February 3, 2012\
+      return "libpng version 1.5.9rc01 - February 17, 2012\
       Copyright (c) 1998-2011 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 809efef..b0b0b3d 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.9beta01 - February 3, 2012
+ * libpng version 1.5.9rc01 - February 17, 2012
  * Copyright (c) 1998-2012 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.)
@@ -11,7 +11,7 @@
  * 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 1.5.9beta01 - February 3, 2012: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.9rc01 - February 17, 2012: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -169,7 +169,8 @@
  *    1.5.8beta01             15    10508  15.so.15.8[.0]
  *    1.5.8rc01               15    10508  15.so.15.8[.0]
  *    1.5.8                   15    10508  15.so.15.8[.0]
- *    1.5.9beta01             15    10509  15.so.15.9[.0]
+ *    1.5.9beta01-02          15    10509  15.so.15.9[.0]
+ *    1.5.9rc01               15    10509  15.so.15.9[.0]
  *
  *   Henceforth the source version will match the shared-library major
  *   and minor numbers; the shared-library major version number will be
@@ -201,7 +202,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.9beta01, February 3, 2012, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.9rc01, February 17, 2012, are
  * Copyright (c) 2004, 2006-2012 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:
@@ -313,13 +314,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    February 3, 2012
+ *    February 17, 2012
  *
  *    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 1.5.9beta01 are Y2K compliant.  It is my belief that
+ *    upward through 1.5.9rc01 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -377,9 +378,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.9beta01"
+#define PNG_LIBPNG_VER_STRING "1.5.9rc01"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.9beta01 - February 3, 2012\n"
+     " libpng version 1.5.9rc01 - February 17, 2012\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
@@ -540,7 +541,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_5_9beta01;
+typedef char* png_libpng_version_1_5_9rc01;
 
 /* Three color definitions.  The order of the red, green, and blue, (and the
  * exact size) is not important, although the size of the fields need to
diff --git a/pngconf.h b/pngconf.h
index ea716e7..bbd1a51 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.9beta01 - February 3, 2012
+ * libpng version 1.5.9rc01 - February 17, 2012
  *
  * Copyright (c) 1998-2012 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngpread.c b/pngpread.c
index e9d6cca..b3b6f69 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.5.7 [December 15, 2011]
+ * Last changed in libpng 1.5.9 [(PENDING RELEASE)]
  * Copyright (c) 1998-2011 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.)
@@ -730,8 +730,7 @@
 
       new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
       old_buffer = png_ptr->save_buffer;
-      png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
-          (png_size_t)new_max);
+      png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max);
 
       if (png_ptr->save_buffer == NULL)
       {
@@ -1287,8 +1286,7 @@
    }
 #endif
 
-   png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-       (png_size_t)(length + 1));
+   png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1386,8 +1384,7 @@
    }
 #endif
 
-   png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-       (png_size_t)(length + 1));
+   png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1588,8 +1585,7 @@
    }
 #endif
 
-   png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-       (png_size_t)(length + 1));
+   png_ptr->current_text = (png_charp)png_malloc(png_ptr, length + 1);
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1734,8 +1730,7 @@
        */
       PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
 
-      /* The following cast should be safe because of the check above. */
-      png_ptr->unknown_chunk.size = (png_size_t)length;
+      png_ptr->unknown_chunk.size = length;
 
       if (length == 0)
          png_ptr->unknown_chunk.data = NULL;
diff --git a/pngrutil.c b/pngrutil.c
index 52a73cf..c706ad6 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.9 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2012 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.)
  *
@@ -432,15 +432,18 @@
       /* Now check the limits on this chunk - if the limit fails the
        * compressed data will be removed, the prefix will remain.
        */
+      if (prefix_size >= (~(png_size_t)0) - 1 ||
+         expanded_size >= (~(png_size_t)0) - 1 - prefix_size
 #ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-      if (png_ptr->user_chunk_malloc_max &&
+         || (png_ptr->user_chunk_malloc_max &&
           (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
 #else
 #  ifdef PNG_USER_CHUNK_MALLOC_MAX
-      if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
+         || ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
           prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
 #  endif
 #endif
+         )
          png_warning(png_ptr, "Exceeded size limit while expanding chunk");
 
       /* If the size is zero either there was an error and a message
@@ -448,12 +451,7 @@
        * and we have nothing to do - the code will exit through the
        * error case below.
        */
-#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
-    defined(PNG_USER_CHUNK_MALLOC_MAX)
       else if (expanded_size > 0)
-#else
-      if (expanded_size > 0)
-#endif
       {
          /* Success (maybe) - really uncompress the chunk. */
          png_size_t new_size = 0;
@@ -1279,7 +1277,7 @@
 
    png_free(png_ptr, png_ptr->chunkdata);
    png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, skip))
@@ -1429,7 +1427,7 @@
     * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
     * potential breakage point if the types in pngconf.h aren't exactly right.
     */
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, skip))
@@ -1956,7 +1954,7 @@
       return;
    }
 
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, 0))
@@ -2105,7 +2103,7 @@
       return;
    }
 
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
    png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
 
@@ -2265,7 +2263,7 @@
      return;
    }
 
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, skip))
@@ -2373,7 +2371,7 @@
       return;
    }
 
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, 0))
@@ -2504,7 +2502,7 @@
       return;
    }
 
-   slength = (png_size_t)length;
+   slength = length;
    png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, 0))
diff --git a/pngstruct.h b/pngstruct.h
index 6a7dc20..3425ff2 100644
--- a/pngstruct.h
+++ b/pngstruct.h
@@ -5,7 +5,7 @@
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
- * Last changed in libpng 1.5.5 [September 22, 2011]
+ * Last changed in libpng 1.5.9 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/pngtest.c b/pngtest.c
index 9b9066b..cd6f029 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1165,7 +1165,7 @@
          pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
 
          if (verbose)
-            printf("\nText compression=%d\n", text_ptr->compression);
+            printf("\n Text compression=%d\n", text_ptr->compression);
 
          png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
       }
@@ -1817,4 +1817,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_9beta01 Your_png_h_is_not_version_1_5_9beta01;
+typedef png_libpng_version_1_5_9rc01 Your_png_h_is_not_version_1_5_9rc01;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 62316f0..f9e9a9a 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.9beta01 - February 3, 2012
+libpng version 1.5.9rc01 - February 17, 2012
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index e95e484..987de43 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.9beta01 - February 3, 2012
+ * libpng version 1.5.9rc01 - February 17, 2012
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 55582f4..caf0820 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,9 @@
 
-Makefiles for  libpng version 1.5.9beta01 - February 3, 2012
+Makefiles for  libpng version 1.5.9rc01 - February 17, 2012
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng15.so.15.1.5.9beta01)
+                       (gcc, creates libpng15.so.15.1.5.9rc01)
  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 libpng15.so.15.1.5.9beta01)
+                       (gcc, creates libpng15.so.15.1.5.9rc01)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
@@ -35,12 +35,12 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng15.so.15.1.5.9beta01)
+                       creates libpng15.so.15.1.5.9rc01)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng15.so.15.1.5.9beta01)
+                       creates libpng15.so.15.1.5.9rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng15.so.15.1.5.9beta01)
+                       creates libpng15.so.15.1.5.9rc01)
  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 e9e62f2..978ac09 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.5.9beta01
+version=1.5.9rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index d356bcc..fc7a0c8 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.5.9beta01
+Version: 1.5.9rc01
 Libs: -L${libdir} -lpng15
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index d201981..f5e249a 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png15
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.5.9beta01
+SHLIB_MINOR=	1.5.9rc01
 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 12ad7cc..287a0dd 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.9beta01
+SHLIB_MINOR=	1.5.9rc01
 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.openbsd b/scripts/makefile.openbsd
index d73bca2..87c5e28 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.9beta01
+SHLIB_MINOR=	1.5.9rc01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index bf3601a..d1f3ec6 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -3,7 +3,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.5.9beta02 - February 6, 2012 */
+/* Libpng 1.5.9rc01 - February 17, 2012 */
 
 /* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
 
diff --git a/scripts/symbols.def b/scripts/symbols.def
index 83fee77..ff5684c 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.5.9beta01
+;Version 1.5.9rc01
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3