diff --git a/ANNOUNCE b/ANNOUNCE
index 7b4de16fb..220bbeca8 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.24beta03 - October 29, 2015
+Libpng 1.5.24beta03 - October 30, 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.
@@ -52,8 +52,13 @@ Version 1.5.24beta02 [October 15, 2015]
   Merged pngvalid.c with version 1.6.19.
   Added sPLT support to pngtest.c
 
-Version 1.5.24beta03 [October 29, 2015]
+Version 1.5.24beta03 [October 30, 2015]
   Prevent writing over-length PLTE chunk (Cosmin Truta).
+  Libpng incorrectly calculated the output rowbytes when the application
+    decreased either the number of channels or the bit depth (or both) in
+    a user transform.  This was safe; libpng overallocated buffer space
+   (potentially by quite a lot; up to 4 times the amount required) but,
+   from 1.5.4 on, resulted in a png_error (John Bowler).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 28e2a5550..bce17bb4a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4399,8 +4399,13 @@ Version 1.5.24beta02 [October 15, 2015]
   Merged pngvalid.c with version 1.6.19.
   Added sPLT support to pngtest.c
 
-Version 1.5.24beta03 [October 29, 2015]
+Version 1.5.24beta03 [October 30, 2015]
   Prevent writing over-length PLTE chunk (Cosmin Truta).
+  Libpng incorrectly calculated the output rowbytes when the application
+    decreased either the number of channels or the bit depth (or both) in
+    a user transform.  This was safe; libpng overallocated buffer space
+   (potentially by quite a lot; up to 4 times the amount required) but,
+   from 1.5.4 on, resulted in a png_error (John Bowler).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngrtran.c b/pngrtran.c
index 34d4fca3f..15b3c330c 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 1.5.22 [March 26, 2015]
+ * Last changed in libpng 1.5.24 [(PENDING RELEASE)]
  * Copyright (c) 1998-2015 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.)