diff --git a/ANNOUNCE b/ANNOUNCE
index e9c3f68..1751d34 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.11beta02 - April 28, 2012
+Libpng 1.5.11rc01 - May 22, 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.
@@ -9,20 +9,20 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.5.11beta02.tar.xz (LZMA-compressed, recommended)
-   1.5.11beta02.tar.gz
-   1.5.11beta02.tar.bz2
+   1.5.11rc01.tar.xz (LZMA-compressed, recommended)
+   1.5.11rc01.tar.gz
+   1.5.11rc01.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1511b02.7z  (LZMA-compressed, recommended)
-   lp1511b02.zip
+   lp1511r01.7z  (LZMA-compressed, recommended)
+   lp1511r01.zip
 
 Other information:
 
-   1.5.11beta02-README.txt
-   1.5.11beta02-LICENSE.txt
+   1.5.11rc01-README.txt
+   1.5.11rc01-LICENSE.txt
 
 Changes since the last public release (1.5.10):
 
@@ -37,7 +37,8 @@
   Added -lssp_nonshared in a comment in scripts/makefile.freebsd
     and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
 
-Version 1.5.11beta02 [April 28, 2012]
+Version 1.5.11rc01 [May 22, 2012]
+  No changes.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index d1d9ab4..65862d1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3865,7 +3865,8 @@
   Added -lssp_nonshared in a comment in scripts/makefile.freebsd
     and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
 
-Version 1.5.11beta02 [April 28, 2012]
+Version 1.5.11rc01 [May 22, 2012]
+  No changes.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4081e4e..f18ba2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -225,7 +225,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 15.${PNGLIB_RELEASE}.1.5.11beta02
+#   VERSION 15.${PNGLIB_RELEASE}.1.5.11rc01
     VERSION 15.${PNGLIB_RELEASE}.0
     SOVERSION 15
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/LICENSE b/LICENSE
index 7433d15..946f4ae 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 1.5.11beta02, April 28, 2012, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.11rc01, May 22, 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
-April 28, 2012
+May 22, 2012
diff --git a/README b/README
index 99028f7..64a3d6c 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.11beta02 - April 28, 2012 (shared library 15.0)
+README for libpng version 1.5.11rc01 - May 22, 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 9015f65..8ba0d83 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 1.5.11beta02.
+# Generated by GNU Autoconf 2.68 for libpng 1.5.11rc01.
 #
 # 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='1.5.11beta02'
-PACKAGE_STRING='libpng 1.5.11beta02'
+PACKAGE_VERSION='1.5.11rc01'
+PACKAGE_STRING='libpng 1.5.11rc01'
 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 1.5.11beta02 to adapt to many kinds of systems.
+\`configure' configures libpng 1.5.11rc01 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 1.5.11beta02:";;
+     short | recursive ) echo "Configuration of libpng 1.5.11rc01:";;
    esac
   cat <<\_ACEOF
 
@@ -1502,7 +1502,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.5.11beta02
+libpng configure 1.5.11rc01
 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 1.5.11beta02, which was
+It was created by libpng $as_me 1.5.11rc01, 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='1.5.11beta02'
+ VERSION='1.5.11rc01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2804,7 +2804,7 @@
 
 
 
-PNGLIB_VERSION=1.5.11beta02
+PNGLIB_VERSION=1.5.11rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=11
@@ -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 1.5.11beta02, which was
+This file was extended by libpng $as_me 1.5.11rc01, 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 1.5.11beta02
+libpng config.status 1.5.11rc01
 configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index f8f8a19..8ba267a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.5.11beta02], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.5.11rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.5.11beta02
+PNGLIB_VERSION=1.5.11rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=5
 PNGLIB_RELEASE=11
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 0c61100..07d5dfd 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 1.5.11beta02 - April 28, 2012
+ libpng version 1.5.11rc01 - May 22, 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 1.5.11beta02 - April 28, 2012
+ libpng versions 0.97, January 1998, through 1.5.11rc01 - May 22, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -4602,13 +4602,13 @@
 
 XIV. Y2K Compliance in libpng
 
-April 28, 2012
+May 22, 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 1.5.11beta02 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.11rc01 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 902a281..7c24be1 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "April 28, 2012"
+.TH LIBPNG 3 "May 22, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.11beta02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.11rc01
 .SH SYNOPSIS
 \fI\fB
 
@@ -981,7 +981,7 @@
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.11beta02 - April 28, 2012
+ libpng version 1.5.11rc01 - May 22, 2012
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -992,7 +992,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.11beta02 - April 28, 2012
+ libpng versions 0.97, January 1998, through 1.5.11rc01 - May 22, 2012
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2011 Glenn Randers-Pehrson
 
@@ -5584,13 +5584,13 @@
 
 .SH XIV. Y2K Compliance in libpng
 
-April 28, 2012
+May 22, 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 1.5.11beta02 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.11rc01 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
@@ -5803,7 +5803,8 @@
  1.5.9               15    10509  15.so.15.9[.0]
  1.5.10beta01-05     15    10510  15.so.15.10[.0]
  1.5.10              15    10510  15.so.15.10[.0]
- 1.5.11beta01-02     15    10511  15.so.15.11[.0]
+ 1.5.11beta01        15    10511  15.so.15.11[.0]
+ 1.5.11rc01          15    10511  15.so.15.11[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -5860,7 +5861,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.11beta02 - April 28, 2012:
+Libpng version 1.5.11rc01 - May 22, 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).
 
@@ -5883,7 +5884,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.11beta02, April 28, 2012, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.11rc01, May 22, 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
@@ -5982,7 +5983,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 28, 2012
+May 22, 2012
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 9e1f0bc..752d70a 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "April 28, 2012"
+.TH LIBPNGPF 3 "May 22, 2012"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.11beta02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.11rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
diff --git a/png.5 b/png.5
index 9e22ab6..dfaa54c 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "April 28, 2012"
+.TH PNG 5 "May 22, 2012"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 3b7c622..569a1b5 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_11beta02 Your_png_h_is_not_version_1_5_11beta02;
+typedef png_libpng_version_1_5_11rc01 Your_png_h_is_not_version_1_5_11rc01;
 
 /* 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 1.5.11beta02 - April 28, 2012" PNG_STRING_NEWLINE \
+     "libpng version 1.5.11rc01 - May 22, 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 1.5.11beta02 - April 28, 2012\
+      return "libpng version 1.5.11rc01 - May 22, 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 40b5ccc..08c0650 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.11beta02 - April 28, 2012
+ * libpng version 1.5.11rc01 - May 22, 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 1.5.11beta02 - April 28, 2012: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.11rc01 - May 22, 2012: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -174,7 +174,8 @@
  *    1.5.9                   15    10509  15.so.15.9[.0]
  *    1.5.10beta01-05         15    10510  15.so.15.10[.0]
  *    1.5.10                  15    10510  15.so.15.10[.0]
- *    1.5.11beta01-02         15    10511  15.so.15.11[.0]
+ *    1.5.11beta01            15    10511  15.so.15.11[.0]
+ *    1.5.11rc01              15    10511  15.so.15.11[.0]
  *
  *   Henceforth the source version will match the shared-library major
  *   and minor numbers; the shared-library major version number will be
@@ -206,7 +207,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.11beta02, April 28, 2012, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.11rc01, May 22, 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:
@@ -318,13 +319,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    April 28, 2012
+ *    May 22, 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 1.5.11beta02 are Y2K compliant.  It is my belief that
+ *    upward through 1.5.11rc01 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
@@ -382,9 +383,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.11beta02"
+#define PNG_LIBPNG_VER_STRING "1.5.11rc01"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.11beta02 - April 28, 2012\n"
+     " libpng version 1.5.11rc01 - May 22, 2012\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
@@ -398,7 +399,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  02
+#define PNG_LIBPNG_VER_BUILD  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -415,7 +416,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#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.
@@ -545,7 +546,7 @@
 /* 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_11beta02;
+typedef char* png_libpng_version_1_5_11rc01;
 
 /* 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 e9f3eb1..b501a88 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.11beta02 - April 28, 2012
+ * libpng version 1.5.11rc01 - May 22, 2012
  *
  * Copyright (c) 1998-2012 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngtest.c b/pngtest.c
index 4d7a090..d6d3966 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -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_11beta02 Your_png_h_is_not_version_1_5_11beta02;
+typedef png_libpng_version_1_5_11rc01 Your_png_h_is_not_version_1_5_11rc01;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index fe5df82..10ad921 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.11beta02 - April 28, 2012
+libpng version 1.5.11rc01 - May 22, 2012
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index b6909c3..c2981d3 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.11beta02 - April 28, 2012
+ * libpng version 1.5.11rc01 - May 22, 2012
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index c942836..9ded1bc 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,9 @@
 
-Makefiles for  libpng version 1.5.11beta02 - April 28, 2012
+Makefiles for  libpng version 1.5.11rc01 - May 22, 2012
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng15.so.15.1.5.11beta02)
+                       (gcc, creates libpng15.so.15.1.5.11rc01)
  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.15.1.5.11beta02)
+                       (gcc, creates libpng15.so.15.1.5.11rc01)
  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.15.1.5.11beta02)
+                       creates libpng15.so.15.1.5.11rc01)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng15.so.15.1.5.11beta02)
+                       creates libpng15.so.15.1.5.11rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng15.so.15.1.5.11beta02)
+                       creates libpng15.so.15.1.5.11rc01)
  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 251aa72..ff34022 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.5.11beta02
+version=1.5.11rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index f3c5b29..d8f4818 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.5.11beta02
+Version: 1.5.11rc01
 Libs: -L${libdir} -lpng15
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 1c44bf4..dd72d50 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png15
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.5.11beta02
+SHLIB_MINOR=	1.5.11rc01
 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 ec59d14..934c484 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.11beta02
+SHLIB_MINOR=	1.5.11rc01
 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 baacea2..247cc57 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	15
-SHLIB_MINOR=	1.5.11beta02
+SHLIB_MINOR=	1.5.11rc01
 
 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 561494f..f94e0ec 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -3,7 +3,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.5.11beta02 - April 28, 2012 */
+/* Libpng 1.5.11rc01 - May 22, 2012 */
 
 /* Copyright (c) 1998-2012 Glenn Randers-Pehrson */
 
diff --git a/scripts/symbols.def b/scripts/symbols.def
index 9614447..12321f1 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.5.11beta02
+;Version 1.5.11rc01
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3