diff --git a/contrib/libtests/makepng.c b/contrib/libtests/makepng.c
index f5fdf5fd52a6aa7319c1670c3696344b9df7fcc6..3b2e92f4f8fd222db71cbb8fb6b7ac0c92c4b4ee 100644
--- a/contrib/libtests/makepng.c
+++ b/contrib/libtests/makepng.c
@@ -2,7 +2,7 @@
  *
  * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/contrib/libtests/pngstest.c b/contrib/libtests/pngstest.c
index 32d5eea49b09fba7d7b248e3610b8ccf41b9d922..543e50bd079e95ab32b7fddbd6aaaa94de44ee46 100644
--- a/contrib/libtests/pngstest.c
+++ b/contrib/libtests/pngstest.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/contrib/libtests/pngunknown.c b/contrib/libtests/pngunknown.c
index 9d9acc0f70f8f55014e2de50d33d4097a92603f7..9b8de34b4f4cfdc1e52e84d293d0370f4cb6f920 100644
--- a/contrib/libtests/pngunknown.c
+++ b/contrib/libtests/pngunknown.c
@@ -1,7 +1,7 @@
 
 /* pngunknown.c - test the read side unknown chunk handling
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  * Copyright (c) 2013 Glenn Randers-Pehrson
  * Written by John Cunningham Bowler
  *
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index cc4e8aa9f8069f052918bf8a5b516900c1c7134d..8d5819643e820869f33ed6a438201413745d0647 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -1,7 +1,7 @@
 
 /* pngvalid.c - validate libpng by constructing then reading png files.
  *
- * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  * Copyright (c) 2013 Glenn Randers-Pehrson
  * Written by John Cunningham Bowler
  *
diff --git a/contrib/libtests/readpng.c b/contrib/libtests/readpng.c
index c5baef53de1ddea4b6005b6af0b1e15a7b368fa6..ea866f9b9572100dee7cb21f129ae8340d9f5373 100644
--- a/contrib/libtests/readpng.c
+++ b/contrib/libtests/readpng.c
@@ -2,7 +2,7 @@
  *
  * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/contrib/libtests/timepng.c b/contrib/libtests/timepng.c
index 3469afeb6b06eca7cacd32ff3c9e780166f4631a..ecb498f269c61b989a68a121edf84202bc5e553c 100644
--- a/contrib/libtests/timepng.c
+++ b/contrib/libtests/timepng.c
@@ -2,7 +2,7 @@
  *
  * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
diff --git a/png.c b/png.c
index 0a6df99b25f5c75846cb5064df7c4345bc56492e..f13c1c2161b713e037c111975e9f5c0f214692f3 100644
--- a/png.c
+++ b/png.c
@@ -768,13 +768,13 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.6.1beta07 - March 4, 2013" PNG_STRING_NEWLINE \
+     "libpng version 1.6.1beta07 - March 5, 2013" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2013 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 1.6.1beta07 - March 4, 2013\
+      return "libpng version 1.6.1beta07 - March 5, 2013\
       Copyright (c) 1998-2013 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -2179,7 +2179,7 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
          if (length == png_sRGB_checks[i].length &&
             intent == png_sRGB_checks[i].intent)
          {
-            /* Now calculate the alder32 if not done already. */
+            /* Now calculate the adler32 if not done already. */
             if (adler == 0)
             {
                adler = adler32(0, NULL, 0);