diff --git a/ANNOUNCE b/ANNOUNCE
index b66a0291..5d4c97bd 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.2.27beta06 - April 21, 2008
+Libpng 1.2.27rc01 - April 23, 2008
 
 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.
@@ -9,37 +9,37 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.27beta06.tar.gz
-   libpng-1.2.27beta06.tar.lzma
+   libpng-1.2.27rc01.tar.gz
+   libpng-1.2.27rc01.tar.lzma
      (Get the lzma codec from <http://tukaani.org/lzma>).
-   libpng-1.2.27beta06.tar.bz2
+   libpng-1.2.27rc01.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.27beta06-no-config.tar.gz
-   libpng-1.2.27beta06-no-config.tar.lzma
-   libpng-1.2.27beta06-no-config.tar.bz2
+   libpng-1.2.27rc01-no-config.tar.gz
+   libpng-1.2.27rc01-no-config.tar.lzma
+   libpng-1.2.27rc01-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1227b06.zip
-   lp1227b06.7z
-   lp1227b06.tar.bz2
+   lp1227r01.zip
+   lp1227r01.7z
+   lp1227r01.tar.bz2
 
 Project files
 
-   libpng-1.2.27beta06-project-netware.zip
-   libpng-1.2.27beta06-project-wince.zip
+   libpng-1.2.27rc01-project-netware.zip
+   libpng-1.2.27rc01-project-wince.zip
 
 Other information:
 
-   libpng-1.2.27beta06-README.txt
-   libpng-1.2.27beta06-KNOWNBUGS.txt
-   libpng-1.2.27beta06-LICENSE.txt
-   libpng-1.2.27beta06-Y2K-compliance.txt
-   libpng-1.2.27beta06-[previous version]-diff.txt
+   libpng-1.2.27rc01-README.txt
+   libpng-1.2.27rc01-KNOWNBUGS.txt
+   libpng-1.2.27rc01-LICENSE.txt
+   libpng-1.2.27rc01-Y2K-compliance.txt
+   libpng-1.2.27rc01-[previous version]-diff.txt
 
 Changes since the last public release (1.2.26):
 
@@ -70,7 +70,11 @@ version 1.2.27beta05 [April 19, 2008]
   Added MAINTEINERCLEANFILES variable to Makefile.am
 
 version 1.2.27beta06 [April 21, 2008]
-  Avoid transforming color_type to RGB by png_set_expand_1_2_4_to_8().
+  Avoid changing color_type from GRAY to RGB by
+    png_set_expand_gray_1_2_4_to_8().
+
+version 1.2.27rc01 [April 23, 2008]
+  Fix broken URL for rfc2083 in png.5 and libpng-*.txt
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
diff --git a/CHANGES b/CHANGES
index 8a6b01e7..e06c0555 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2130,8 +2130,11 @@ version 1.2.27beta05 [April 19, 2008]
   Added MAINTEINERCLEANFILES variable to Makefile.am
 
 version 1.2.27beta06 [April 21, 2008]
-  Avoid transforming color_type to RGB by png_set_expand_1_2_4_to_8().
+  Avoid changing color_type from GRAY to RGB by
+    png_set_expand_gray_1_2_4_to_8().
 
+version 1.2.27rc01 [April 23, 2008]
+  Fix broken URL for rfc2083 in png.5 and libpng-*.txt
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/INSTALL b/INSTALL
index 362f6dd4..b000bd5c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.2.27beta06 - April 21, 2008
+Installing libpng version 1.2.27rc01 - April 23, 2008
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -44,7 +44,7 @@ to have access to the zlib.h and zconf.h include files that
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.2.27beta06" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.2.27rc01" or "lpng109" and "zlib-1.2.1"
 or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -101,9 +101,9 @@ include
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng12.so.0.1.2.27beta06)
+                       gcc, creates libpng12.so.0.1.2.27rc01)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.27beta06)
+                       (gcc, creates libpng12.so.0.1.2.27rc01)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -125,14 +125,14 @@ include
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng12.so.0.1.2.27beta06)
+                       creates libpng12.so.0.1.2.27rc01)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta06)
+                       creates libpng12.so.0.1.2.27rc01)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta06)
+                       creates libpng12.so.0.1.2.27rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng12.so.0.1.2.27beta06)
+                       creates libpng12.so.0.1.2.27rc01)
  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/KNOWNBUG b/KNOWNBUG
index 8992d0aa..717aafda 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.2.27beta06
+Known bugs in libpng version 1.2.27rc01
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index ca84d010..98819354 100644
--- a/LICENSE
+++ b/LICENSE
@@ -8,7 +8,7 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.27beta06, April 21, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.27rc01, April 23, 2008, 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
@@ -106,4 +106,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 21, 2008
+April 23, 2008
diff --git a/Makefile.am b/Makefile.am
index 3db0cc42..84504e8d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,7 +86,7 @@ EXTRA_DIST= \
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.2.27beta06.txt pngvcrd.c 
+	example.c libpng-1.2.27rc01.txt pngvcrd.c 
 
 CLEANFILES= pngout.png libpng12.pc libpng12-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index 75d78074..c1239e07 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.2.27beta06 - April 21, 2008 (shared library 12.0)
+README for libpng version 1.2.27rc01 - April 23, 2008 (shared library 12.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -191,11 +191,11 @@ Files in this distribution:
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng12.so.0.1.2.27beta06)
+                            gcc, creates libpng12.so.0.1.2.27rc01)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta06)
+                            (gcc, creates libpng12.so.0.1.2.27rc01)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta06,
+                            (gcc, creates libpng12.so.0.1.2.27rc01,
                             uses assembler code tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -217,12 +217,12 @@ Files in this distribution:
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng12.so.0.1.2.27beta06)
+                            (gcc, creates libpng12.so.0.1.2.27rc01)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta06)
+                            (gcc, creates libpng12.so.0.1.2.27rc01)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng12.so.0.1.2.27beta06)
+                            (gcc, creates libpng12.so.0.1.2.27rc01)
        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 224bccee..2a9856d8 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      April 21, 2008
+      April 23, 2008
 
       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 1.2.27beta06 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.27rc01 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 b3909777..99a1aeff 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.62 for libpng 1.2.27beta06.
+# Generated by GNU Autoconf 2.62 for libpng 1.2.27rc01.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -745,8 +745,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.2.27beta06'
-PACKAGE_STRING='libpng 1.2.27beta06'
+PACKAGE_VERSION='1.2.27rc01'
+PACKAGE_STRING='libpng 1.2.27rc01'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 
 ac_unique_file="pngget.c"
@@ -1483,7 +1483,7 @@ if test "$ac_init_help" = "long"; then
   # 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 1.2.27beta06 to adapt to many kinds of systems.
+\`configure' configures libpng 1.2.27rc01 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1553,7 +1553,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.2.27beta06:";;
+     short | recursive ) echo "Configuration of libpng 1.2.27rc01:";;
    esac
   cat <<\_ACEOF
 
@@ -1660,7 +1660,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.2.27beta06
+libpng configure 1.2.27rc01
 generated by GNU Autoconf 2.62
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1674,7 +1674,7 @@ cat >config.log <<_ACEOF
 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 1.2.27beta06, which was
+It was created by libpng $as_me 1.2.27rc01, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   $ $0 $@
@@ -2388,7 +2388,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.2.27beta06'
+ VERSION='1.2.27rc01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2557,7 +2557,7 @@ fi
 
 
 
-PNGLIB_VERSION=1.2.27beta06
+PNGLIB_VERSION=1.2.27rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=27
@@ -13021,7 +13021,7 @@ exec 6>&1
 # 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 1.2.27beta06, which was
+This file was extended by libpng $as_me 1.2.27rc01, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13074,7 +13074,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_version="\\
-libpng config.status 1.2.27beta06
+libpng config.status 1.2.27rc01
 configured by $0, generated by GNU Autoconf 2.62,
   with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/configure.ac b/configure.ac
index c4698e84..48b67ea5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@ AC_PREREQ(2.59)
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.2.27beta06], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.2.27rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.2.27beta06
+PNGLIB_VERSION=1.2.27rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=27
diff --git a/libpng-1.2.27beta06.txt b/libpng-1.2.27rc01.txt
similarity index 99%
rename from libpng-1.2.27beta06.txt
rename to libpng-1.2.27rc01.txt
index 2c7a2ae8..ad4393b5 100644
--- a/libpng-1.2.27beta06.txt
+++ b/libpng-1.2.27rc01.txt
@@ -1,13 +1,17 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.27beta06 - April 21, 2008
+ libpng version 1.2.27rc01 - April 23, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
- based on:
+ Based on:
+
+ libpng versions 0.97, January 1998, through 1.2.27rc01 - April 23, 2008
+ Updated and distributed by Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger
@@ -846,6 +850,7 @@ added.  It expands the sample depth without changing tRNS to alpha.
 At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
 will be removed from a future version.
 
+
 PNG can have files with 16 bits per channel.  If you only can handle
 8 bits per channel, this will strip the pixels down to 8 bit.
 
@@ -2846,13 +2851,13 @@ application:
 
 IX. Y2K Compliance in libpng
 
-April 21, 2008
+April 23, 2008
 
 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 1.2.27beta06 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.27rc01 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 b426df0a..373b089b 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "April 21, 2008"
+.TH LIBPNG 3 "April 23, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta06
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27rc01
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -410,14 +410,18 @@ Following is a copy of the libpng.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.27beta06 - April 21, 2008
+ libpng version 1.2.27rc01 - April 23, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
- based on:
+ Based on:
+
+ libpng versions 0.97, January 1998, through 1.2.27rc01 - April 23, 2008
+ Updated and distributed by Glenn Randers-Pehrson
+ Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger
@@ -1256,6 +1260,7 @@ added.  It expands the sample depth without changing tRNS to alpha.
 At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
 will be removed from a future version.
 
+
 PNG can have files with 16 bits per channel.  If you only can handle
 8 bits per channel, this will strip the pixels down to 8 bit.
 
@@ -3256,13 +3261,13 @@ application:
 
 .SH IX. Y2K Compliance in libpng
 
-April 21, 2008
+April 23, 2008
 
 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 1.2.27beta06 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.27rc01 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
@@ -3520,7 +3525,7 @@ ftp://ftp.info-zip.org/pub/infozip/zlib
 .I libpng
 or at
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
@@ -3540,7 +3545,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.2.27beta06 - April 21, 2008:
+Libpng version 1.2.27rc01 - April 23, 2008:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3561,7 +3566,7 @@ included in the libpng distribution, the latter shall prevail.)
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.27beta06, April 21, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.27rc01, April 23, 2008, 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
@@ -3660,7 +3665,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 21, 2008
+April 23, 2008
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 030c886d..1cd70229 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "April 21, 2008"
+.TH LIBPNGPF 3 "April 23, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27beta06
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.27rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index b30d1467..4f843794 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "April 21, 2008"
+.TH PNG 5 "April 23, 2008"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -35,7 +35,7 @@ PNG 1.0 specification, October 1996:
 RFC 2083
 .IP
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
diff --git a/png.c b/png.c
index 822343be..9494b24b 100644
--- a/png.c
+++ b/png.c
@@ -13,7 +13,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_27beta06 Your_png_h_is_not_version_1_2_27beta06;
+typedef version_1_2_27rc01 Your_png_h_is_not_version_1_2_27rc01;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -693,7 +693,7 @@ png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.2.27beta06 - April 21, 2008\n\
+   return ((png_charp) "\n libpng version 1.2.27rc01 - April 23, 2008\n\
    Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
diff --git a/png.h b/png.h
index ff0975c0..f162c29f 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.27beta06 - April 21, 2008
+ * libpng version 1.2.27rc01 - April 23, 2008
  * Copyright (c) 1998-2008 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.)
@@ -8,7 +8,7 @@
  * 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 1.2.27beta06 - April 21, 2008: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.27rc01 - April 23, 2008: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -212,7 +212,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.27beta06, April 21, 2008, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.27rc01, April 23, 2008, 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:
@@ -324,13 +324,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    April 21, 2008
+ *    April 23, 2008
  *
  *    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 1.2.27beta06 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.27rc01 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
@@ -386,9 +386,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.27beta06"
+#define PNG_LIBPNG_VER_STRING "1.2.27rc01"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.27beta06 - April 21, 2008\n"
+   " libpng version 1.2.27rc01 - April 23, 2008\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  13
@@ -400,7 +400,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  06
+#define PNG_LIBPNG_VER_BUILD  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -417,7 +417,7 @@
 #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.
@@ -1441,7 +1441,7 @@ struct png_struct_def
 /* 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_2_27beta06;
+typedef png_structp version_1_2_27rc01;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index 77f4abed..ab2c39f8 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.2.27beta06 - April 21, 2008
+ * libpng version 1.2.27rc01 - April 23, 2008
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngmem.c b/pngmem.c
index 35be7b29..2f8983e9 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngpread.c b/pngpread.c
index 5d94195b..b46acc5d 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngrtran.c b/pngrtran.c
index 84d1b77d..d32a2302 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 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngrutil.c b/pngrutil.c
index 3950894f..62cccff3 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngset.c b/pngset.c
index f9df1f6a..71da9769 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngtest.c b/pngtest.c
index f7d56cd6..0019d073 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.2.27 - [April 21, 2008]
+ * Last changed in libpng 1.2.27 - [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1560,4 +1560,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_27beta06 your_png_h_is_not_version_1_2_27beta06;
+typedef version_1_2_27rc01 your_png_h_is_not_version_1_2_27rc01;
diff --git a/pngwrite.c b/pngwrite.c
index 57e42379..4a67cd2a 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngwutil.c b/pngwutil.c
index 7dc61af2..af2d9680 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.27 [April 21, 2008]
+ * Last changed in libpng 1.2.27 [April 23, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index 9dd22b81..fe4b5b79 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -169,7 +169,7 @@ configure_file(${PNG_SOURCE_DIR}/scripts/libpng-config.in
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.2.27beta06
+#    VERSION 0.${PNGLIB_RELEASE}.1.2.27rc01
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index d572302b..2bad60e1 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.2.27beta06
+version=1.2.27rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc-configure.in b/scripts/libpng.pc-configure.in
index a84d8bda..0c903bc0 100644
--- a/scripts/libpng.pc-configure.in
+++ b/scripts/libpng.pc-configure.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.27beta06
+Version: 1.2.27rc01
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir} @LIBPNG_NO_MMX@
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index a5cfec58..9ec5f572 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.27beta06
+Version: 1.2.27rc01
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index 228708aa..1c05481b 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index de946cdc..e3aeb332 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index 1e80c00f..4caa4b40 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -20,7 +20,7 @@ LN_SF = ln -f -s
 
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 20c57eb7..dd1f2bea 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index 17ffd804..898456eb 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -74,7 +74,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 CYGDLL = 12
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index a2f58e88..e6582c0d 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -19,7 +19,7 @@ ZLIBINC=../zlib
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index 6860115c..e2f58f8e 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index 19883408..04be2cff 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index 9d06a5f2..4b4a9c11 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -14,7 +14,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index ca4ac9a1..b82c9733 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index 5a3a0920..b1e49c13 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index 3b80cfe4..108ea61d 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 4a3301ee..85a9c854 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 211c72df..dc6fe8d4 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -74,7 +74,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 MINGDLL = 12
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index d62aed50..55065894 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng12
 
 LIB=	png12
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.27beta06
+SHLIB_MINOR=	1.2.27rc01
 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 321b0f7d..6c3bcd7c 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.2.27beta06
+SHLIB_MINOR=	1.2.27rc01
 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 bacc1621..d6589dc6 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -7,7 +7,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index f1cfe67c..675ee3a4 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -8,7 +8,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.27beta06
+SHLIB_MINOR=	1.2.27rc01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index 5a7cdd3c..2c2f97da 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index b786cb25..4cc893f5 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index e2fc284e..2182b206 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index 41d0de8a..d285b900 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index 2ecd6af1..688b01fe 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index 4780dbf2..9fd325fd 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.27beta06
+PNGMIN = 1.2.27rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index d796cb50..119b7a1c 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.2.27beta06
+; Version 1.2.27rc01
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index 8d287a11..f1827ea8 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.2.27beta06
+;Version 1.2.27rc01
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3