diff --git a/ANNOUNCE b/ANNOUNCE
index e535721..1363704 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-Libpng 1.6.19beta04 - October 10, 2015
+Libpng 1.6.19beta04 - October 15, 2015
 
 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.
@@ -92,7 +92,7 @@
     warning, updated pngstest-errors.h for the errors detected with the
     new contrib/testspngs PNG test files (John Bowler).
 
-Version 1.6.19beta04 [October 10, 2015]
+Version 1.6.19beta04 [October 15, 2015]
   Worked around rgb-to-gray issues in libpng 1.6.  The previous
     attempts to ignore the errors in the code aren't quite enough to
     deal with the 'channel selection' encoding added to libpng 1.7; abort.
diff --git a/CHANGES b/CHANGES
index f770320..40e42f1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5375,7 +5375,7 @@
     warning, updated pngstest-errors.h for the errors detected with the
     new contrib/testspngs PNG test files (John Bowler).
 
-Version 1.6.19beta04 [October 10, 2015]
+Version 1.6.19beta04 [October 15, 2015]
   Worked around rgb-to-gray issues in libpng 1.6.  The previous
     attempts to ignore the errors in the code aren't quite enough to
     deal with the 'channel selection' encoding added to libpng 1.7; abort.
diff --git a/LICENSE b/LICENSE
index 0867771..03fcea3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, September 26, 2015, are
+libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, October 15, 2015, are
 Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.0.6
 with the following individuals added to the list of Contributing Authors:
@@ -104,4 +104,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 26, 2015
+October 15, 2015
diff --git a/README b/README
index e543a96..4d674f7 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.6.19beta04 - September 26, 2015 (shared library 16.0)
+README for libpng version 1.6.19beta04 - October 15, 2015 (shared library 16.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/contrib/gregbook/readpng2.c b/contrib/gregbook/readpng2.c
index 4cf2600..a9e7ba5 100644
--- a/contrib/gregbook/readpng2.c
+++ b/contrib/gregbook/readpng2.c
@@ -4,7 +4,7 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2015 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -51,6 +51,11 @@
       along with this program; if not, write to the Free Software Foundation,
       Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+  ---------------------------------------------------------------------------
+
+   Changelog:
+     %RDATE% - Check return value of png_get_bKGD() (Glenn R-P)
+
   ---------------------------------------------------------------------------*/
 
 
@@ -261,36 +266,38 @@
     /* since we know we've read all of the PNG file's "header" (i.e., up
      * to IDAT), we can check for a background color here */
 
-    if (mainprog_ptr->need_bgcolor &&
-        png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD))
+    if (mainprog_ptr->need_bgcolor)
     {
         png_color_16p pBackground;
 
         /* it is not obvious from the libpng documentation, but this function
          * takes a pointer to a pointer, and it always returns valid red,
          * green and blue values, regardless of color_type: */
-        png_get_bKGD(png_ptr, info_ptr, &pBackground);
+        if (png_get_bKGD(png_ptr, info_ptr, &pBackground))
+        {
 
-        /* however, it always returns the raw bKGD data, regardless of any
-         * bit-depth transformations, so check depth and adjust if necessary */
-        if (bit_depth == 16) {
-            mainprog_ptr->bg_red   = pBackground->red   >> 8;
-            mainprog_ptr->bg_green = pBackground->green >> 8;
-            mainprog_ptr->bg_blue  = pBackground->blue  >> 8;
-        } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) {
-            if (bit_depth == 1)
-                mainprog_ptr->bg_red = mainprog_ptr->bg_green =
-                  mainprog_ptr->bg_blue = pBackground->gray? 255 : 0;
-            else if (bit_depth == 2)
-                mainprog_ptr->bg_red = mainprog_ptr->bg_green =
-                  mainprog_ptr->bg_blue = (255/3) * pBackground->gray;
-            else /* bit_depth == 4 */
-                mainprog_ptr->bg_red = mainprog_ptr->bg_green =
-                  mainprog_ptr->bg_blue = (255/15) * pBackground->gray;
-        } else {
-            mainprog_ptr->bg_red   = (uch)pBackground->red;
-            mainprog_ptr->bg_green = (uch)pBackground->green;
-            mainprog_ptr->bg_blue  = (uch)pBackground->blue;
+           /* however, it always returns the raw bKGD data, regardless of any
+            * bit-depth transformations, so check depth and adjust if necessary
+            */
+           if (bit_depth == 16) {
+               mainprog_ptr->bg_red   = pBackground->red   >> 8;
+               mainprog_ptr->bg_green = pBackground->green >> 8;
+               mainprog_ptr->bg_blue  = pBackground->blue  >> 8;
+           } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) {
+               if (bit_depth == 1)
+                   mainprog_ptr->bg_red = mainprog_ptr->bg_green =
+                     mainprog_ptr->bg_blue = pBackground->gray? 255 : 0;
+               else if (bit_depth == 2)
+                   mainprog_ptr->bg_red = mainprog_ptr->bg_green =
+                     mainprog_ptr->bg_blue = (255/3) * pBackground->gray;
+               else /* bit_depth == 4 */
+                   mainprog_ptr->bg_red = mainprog_ptr->bg_green =
+                     mainprog_ptr->bg_blue = (255/15) * pBackground->gray;
+           } else {
+               mainprog_ptr->bg_red   = (uch)pBackground->red;
+               mainprog_ptr->bg_green = (uch)pBackground->green;
+               mainprog_ptr->bg_blue  = (uch)pBackground->blue;
+           }
         }
     }
 
diff --git a/libpng-manual.txt b/libpng-manual.txt
index ffb39b7..16e5209 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 1.6.19beta04 - September 26, 2015
+ libpng version 1.6.19beta04 - October 15, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.19beta04 - September 26, 2015
+ libpng versions 0.97, January 1998, through 1.6.19beta04 - October 15, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
 
@@ -5314,7 +5314,7 @@
 
 XVI. Y2K Compliance in libpng
 
-September 26, 2015
+October 15, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
diff --git a/libpng.3 b/libpng.3
index 732816f..6cfc39e 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "September 26, 2015"
+.TH LIBPNG 3 "October 15, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.6.19beta04
 .SH SYNOPSIS
@@ -508,7 +508,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.19beta04 - September 26, 2015
+ libpng version 1.6.19beta04 - October 15, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
@@ -519,7 +519,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.19beta04 - September 26, 2015
+ libpng versions 0.97, January 1998, through 1.6.19beta04 - October 15, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
 
@@ -5822,7 +5822,7 @@
 
 .SH XVI. Y2K Compliance in libpng
 
-September 26, 2015
+October 15, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -6143,7 +6143,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.6.19beta04 - September 26, 2015:
+Libpng version 1.6.19beta04 - October 15, 2015:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -6166,7 +6166,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, September 26, 2015, are
+libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, October 15, 2015, are
 Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.0.6
 with the following individuals added to the list of Contributing Authors:
@@ -6260,7 +6260,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 26, 2015
+October 15, 2015
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index d39457b..a36589d 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "September 26, 2015"
+.TH LIBPNGPF 3 "October 15, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.6.19beta04
 (private functions)
diff --git a/png.5 b/png.5
index cd62882..7ffc1d3 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "September 26, 2015"
+.TH PNG 5 "October 15, 2015"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 5d0ce70..59d1f8c 100644
--- a/png.c
+++ b/png.c
@@ -775,13 +775,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.19beta04 - September 26, 2015" PNG_STRING_NEWLINE \
+      "libpng version 1.6.19beta04 - October 15, 2015" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2015 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 1.6.19beta04 - September 26, 2015\
+   return "libpng version 1.6.19beta04 - October 15, 2015\
       Copyright (c) 1998-2015 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 17d39a1..19e461f 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.19beta04, September 26, 2015
+ * libpng version 1.6.19beta04, October 15, 2015
  *
  * Copyright (c) 1998-2015 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.19beta04, September 26, 2015: Glenn
+ *   libpng versions 0.97, January 1998, through 1.6.19beta04, October 15, 2015: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -251,7 +251,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, September 26, 2015, are
+ * libpng versions 1.0.7, July 1, 2000, through 1.6.19beta04, October 15, 2015, are
  * Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.0.6
  * with the following individuals added to the list of Contributing Authors:
@@ -360,7 +360,7 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    September 26, 2015
+ *    October 15, 2015
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -430,7 +430,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.6.19beta04"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.6.19beta04 - September 26, 2015\n"
+     " libpng version 1.6.19beta04 - October 15, 2015\n"
 
 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 4718066..c207fea 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.6.19beta04 - September 26, 2015
+libpng version 1.6.19beta04 - October 15, 2015
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index bb893e0..5ea1231 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.6.19beta04 - September 26, 2015
+ * libpng version 1.6.19beta04 - October 15, 2015
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 93151fc..0974c43 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.6.19beta04 - September 26, 2015
+Makefiles for  libpng version 1.6.19beta04 - October 15, 2015
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 620e672..2f041b7 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -2,7 +2,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.6.19beta04 - September 26, 2015 */
+/* Libpng version 1.6.19beta04 - October 15, 2015 */
 
 /* Copyright (c) 1998-2014 Glenn Randers-Pehrson */