diff --git a/ANNOUNCE b/ANNOUNCE
index fb9fd03..80a0fe8 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.4.0beta46 - December 10, 2008
+Libpng 1.4.0beta47 - December 15, 2008
 
 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.
@@ -9,27 +9,27 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.0beta46.tar.gz
-   1.4.0beta46.tar.bz2
+   1.4.0beta47.tar.gz
+   1.4.0beta47.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   1.4.0beta46-no-config.tar.gz
-   1.4.0beta46-no-config.tar.bz2
+   1.4.0beta47-no-config.tar.gz
+   1.4.0beta47-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp140b46.zip
-   lp140b46.tar.bz2
+   lp140b47.zip
+   lp140b47.tar.bz2
 
 Other information:
 
-   1.4.0beta46-README.txt
-   1.4.0beta46-KNOWNBUGS.txt
-   1.4.0beta46-LICENSE.txt
-   1.4.0beta46-Y2K-compliance.txt
+   1.4.0beta47-README.txt
+   1.4.0beta47-KNOWNBUGS.txt
+   1.4.0beta47-LICENSE.txt
+   1.4.0beta47-Y2K-compliance.txt
 
 Changes since the last public release (1.2.10):
 
@@ -343,7 +343,7 @@
   Added check for zero-area RGB cHRM triange in png_check_cHRM() and
     png_check_cHRM_fixed().
 
-version 1.4.0beta39 [December 10, 2008]
+version 1.4.0beta39 [December 15, 2008]
   Revised png_warning() to write its message on standard output by default
     when warning_fn is NULL.
 
@@ -375,6 +375,9 @@
     PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
     PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
 
+version 1.4.0beta47 [December 15, 2008]
+  Turned off PNG_READ_DITHER_SUPPORTED by default.
+
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.