diff --git a/example.c b/example.c
index f1753977cb6a7cbcae6f229ec810921769d4126e..8eaffc85e6f4d5172dda135fa4fe1597127dc580 100644
--- a/example.c
+++ b/example.c
@@ -2,7 +2,7 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * This file has been placed in the public domain by the authors.
  * Maintained 1998-2010 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
diff --git a/libpng-1.5.0beta21.txt b/libpng-1.5.0beta22.txt
similarity index 99%
rename from libpng-1.5.0beta21.txt
rename to libpng-1.5.0beta22.txt
index 659b4f37147ee55250d6579b5394d1d59d520245..81f041c4b146f95dec5c7c7cbd66d17ecb3e0a82 100644
--- a/libpng-1.5.0beta21.txt
+++ b/libpng-1.5.0beta22.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.5.0beta21 - April 27, 2010
+ libpng version 1.5.0beta22 - April 28, 2010
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.0beta21 - April 27, 2010
+ libpng versions 0.97, January 1998, through 1.5.0beta22 - April 28, 2010
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -906,7 +906,7 @@ things.
 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 1.5.0beta21, not all possible expansions are supported.
+As of libpng version 1.5.0beta22, 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
@@ -3301,13 +3301,13 @@ Other rules can be inferred by inspecting the libpng source.
 
 XIII. Y2K Compliance in libpng
 
-April 27, 2010
+April 28, 2010
 
 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 1.5.0beta21 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.0beta22 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 32259d5fc2a7cd04a56378879f16303feaeced2b..293df1d7501c4c06502715bd1947febdcfc33b31 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "April 27, 2010"
+.TH LIBPNG 3 "April 28, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta21
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta22
 .SH SYNOPSIS
 \fI\fB
 
@@ -789,7 +789,7 @@ 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 1.5.0beta21 - April 27, 2010
+ libpng version 1.5.0beta22 - April 28, 2010
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -800,7 +800,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.0beta21 - April 27, 2010
+ libpng versions 0.97, January 1998, through 1.5.0beta22 - April 28, 2010
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -1695,7 +1695,7 @@ things.
 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 1.5.0beta21, not all possible expansions are supported.
+As of libpng version 1.5.0beta22, 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
@@ -4090,13 +4090,13 @@ Other rules can be inferred by inspecting the libpng source.
 
 .SH XIII. Y2K Compliance in libpng
 
-April 27, 2010
+April 28, 2010
 
 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 1.5.0beta21 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.0beta22 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
@@ -4330,7 +4330,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.0beta21 - April 27, 2010:
+Libpng version 1.5.0beta22 - April 28, 2010:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4353,7 +4353,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.0beta21, April 27, 2010, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.0beta22, April 28, 2010, 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
@@ -4452,7 +4452,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 27, 2010
+April 28, 2010
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 68063831a7340b49fc7a119b9acc6c4ecf5a6613..26ceba5be705b48c1f6f51cb0b9ab2c882a872c5 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "April 27, 2010"
+.TH LIBPNGPF 3 "April 28, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta21
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta22
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
diff --git a/png.c b/png.c
index e8054ddecdfa3430c1c8a8e9b535a722f7a5ccb8..172b1d01a6b6bdd3b48e764e3e5a0a1b3f237adb 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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.)
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_5_0beta21 Your_png_h_is_not_version_1_5_0beta21;
+typedef version_1_5_0beta22 Your_png_h_is_not_version_1_5_0beta22;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.
@@ -548,13 +548,13 @@ png_get_copyright(png_structp png_ptr)
 #else
 #  ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.5.0beta21 - April 27, 2010" PNG_STRING_NEWLINE \
+     "libpng version 1.5.0beta22 - April 28, 2010" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2010 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 1.5.0beta21 - April 27, 2010\
+      return ((png_charp) "libpng version 1.5.0beta22 - April 28, 2010\
       Copyright (c) 1998-2010 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 569d6456c0b2d2e7ae59c67dff25652aeae87341..a3adbaeba072f9c259ecd9ec21c0c7a6c7454096 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.0beta21 - April 27, 2010
+ * libpng version 1.5.0beta22 - April 28, 2010
  * Copyright (c) 1998-2010 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 1.5.0beta21 - April 27, 2010: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.0beta22 - April 28, 2010: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -170,7 +170,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta21, April 27, 2010, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta22, April 28, 2010, are
  * Copyright (c) 2004, 2006-2010 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:
@@ -282,13 +282,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    April 27, 2010
+ *    April 28, 2010
  *
  *    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 1.5.0beta21 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.5.0beta22 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
@@ -344,9 +344,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.0beta21"
+#define PNG_LIBPNG_VER_STRING "1.5.0beta22"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.0beta21 - April 27, 2010\n"
+     " libpng version 1.5.0beta22 - April 28, 2010\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
@@ -359,7 +359,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  21
+#define PNG_LIBPNG_VER_BUILD  22
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -834,7 +834,7 @@ typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp),);
 /* 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_5_0beta21;
+typedef png_structp version_1_5_0beta22;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index 1f643754ab3c9caf205b434ace895eed9f1b3d9c..fe341ca2711eac5e3d946bdfca3d44d5395b46cd 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.0beta21 - April 27, 2010
+ * libpng version 1.5.0beta22 - April 28, 2010
  *
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngdebug.h b/pngdebug.h
index 887d98aa22022bb21d62a09d734ad167b005aabd..74b5d53755457a8566781e415b1acbfa4a31b51e 100644
--- a/pngdebug.h
+++ b/pngdebug.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 version 1.5.0 - April 27, 2010
+ * Last changed in libpng version 1.5.0 - April 28, 2010
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/pngerror.c b/pngerror.c
index 3b06161e34f51fb4ad7dfd0176617a4356c73944..a3b12f41ecc1a3cb3121c1b9387b43300f09f8cf 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 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 0d8406190c6551c30ad1ed99106b057bc5a15fdd..ab4d8692ffeb46702d570232e3fe233c16c9101d 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.4.1 [April 27, 2010]
+ * Last changed in libpng 1.4.1 [April 28, 2010]
  * Copyright (c) 1998-2010 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/pnginfo.h b/pnginfo.h
index c0377df1ae3217bdf37389afe90cb433379963cf..8b22b64acb97fcae7417d16e097a8a5b9905c018 100644
--- a/pnginfo.h
+++ b/pnginfo.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 version 1.5.0 - April 27, 2010
+ * Last changed in libpng version 1.5.0 - April 28, 2010
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/pngmem.c b/pngmem.c
index d16f9f9090e59e673fb3482a0e7b9a39c91dc971..ce543872a288fbfe9d85a793c450f6c48c8a4e00 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 477529c79f00ee963734af1fa734c82e7251d7bd..05535aa750d914af01c7c99f851a7c0ccd0fb100 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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/pngpriv.h b/pngpriv.h
index 767b25e40321c35196da8fed9ce618d916a2035a..7daabeb50c34d14b764b699a8d06aad3f08aea8d 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.5.0beta21 - April 27, 2010
+ * libpng version 1.5.0beta22 - April 28, 2010
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngread.c b/pngread.c
index a6dac66e139b593a84f7d43561b26041b47f329f..b281cde3a0418a7995da6a16f1dca96d3de276c5 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 d1d1ba04a0e49e0a79728b4dffe64d718b19ef19..10c2f52851a44493d5e5ea65391fb3f410e5bde9 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 2ee525d58666e8e363e32c266498a8cfd2f701b1..2cec3198075fcd644350f7fba43f748f6a240813 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 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 6d02c74fdd079666441c9a91bb1e4e26d32c8fa6..576f9967f99707bd12a31fc6e63c117e63c685c5 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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/pngstruct.h b/pngstruct.h
index cf55d94b6deb648504c72e29d093504bbb4b50d6..767f44c79d8b5f5f2aa9e784bac450a702e41a72 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 version 1.5.0 - April 27, 2010
+ * Last changed in libpng version 1.5.0 - April 28, 2010
  *
  * 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 12f54f6f0ce4ece93c3cd4391aa00e5a5806c981..eeed4148f5d412a943cc30ab02f467b011810475 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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.)
@@ -1632,4 +1632,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_5_0beta21 your_png_h_is_not_version_1_5_0beta21;
+typedef version_1_5_0beta22 your_png_h_is_not_version_1_5_0beta22;
diff --git a/pngtrans.c b/pngtrans.c
index 1c72b85bff857d8d629d7553b8b0ea1faf8e7897..6d9b5dc1be743288695d9ed09664fa5d039cf41d 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 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 bec19fddb81c2d3b1e5e3730fdaa4a40998ab4cd..3c75c4bfa9b78e427ad6d5cc522997126c37f729 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 8fa26cec060d8a6066ca54dacec625156391575e..2154ab8f7fc12b9b6c80ba16375ab6ab0d1e96d9 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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 c37944ba3137d6e3b2e7b06bb7ccfb6e82971e7b..807d2efe61c1531f52d10c57ac131cd155faefdc 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 1.5.0 [April 27, 2010]
+ * Last changed in libpng 1.5.0 [April 28, 2010]
  * Copyright (c) 1998-2010 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.)