diff --git a/ANNOUNCE b/ANNOUNCE
index d45096726..cec77d022 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta70 - November 24, 2015
+Libpng 1.7.0beta70 - November 25, 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.
@@ -1022,8 +1022,16 @@ Version 1.7.0beta69 [November 24, 2015]
   Temporarily disabled filter selection while writing, and temporarily
     replaced pngtest.png accordingly.
 
-Version 1.7.0beta70 [November 24, 2015]
-
+Version 1.7.0beta70 [November 25, 2015]
+  Fixed a simple bracket problem that prevented reading non-interlaced
+    PNG files with height == 1.
+  The code failed to zero out the row buffer at the start of a pass where
+    the AVG filter is used because 'row_number' is not always zero (on
+    interlaced images) and, apparently, the assertion that the buffer had
+    been zeroed when allocated was not always correct for non-interlaced
+    images.  Revealed by pngvalid --size with a hack to make it always
+    use AVG.
+   
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diff --git a/CHANGES b/CHANGES
index 570bd414f..6718d520e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5321,7 +5321,15 @@ Version 1.7.0beta69 [November 24, 2015]
   Temporarily disabled filter selection while writing, and temporarily
     replaced pngtest.png accordingly.
 
-Version 1.7.0beta70 [November 24, 2015]
+Version 1.7.0beta70 [November 25, 2015]
+  Fixed a simple bracket problem that prevented reading non-interlaced
+    PNG files with height == 1.
+  The code failed to zero out the row buffer at the start of a pass where
+    the AVG filter is used because 'row_number' is not always zero (on
+    interlaced images) and, apparently, the assertion that the buffer had
+    been zeroed when allocated was not always correct for non-interlaced
+    images.  Revealed by pngvalid --size with a hack to make it always
+    use AVG.
    
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit