Prepare for 2.5.3c1.
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 7329ee9..1d0a712 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -1,7 +1,7 @@
 What's New in IDLE 1.2.3c1?
 ===========================
 
-*Release date: XX-XXX-2008*
+*Release date: 13-Dec-2008*
 
 - Issue #2665: On Windows, an IDLE installation upgraded from an old version
   would not start if a custom theme was defined.
diff --git a/Lib/idlelib/idlever.py b/Lib/idlelib/idlever.py
index ec8e000..bf76c40 100644
--- a/Lib/idlelib/idlever.py
+++ b/Lib/idlelib/idlever.py
@@ -1 +1 @@
-IDLE_VERSION = "1.2.2"
+IDLE_VERSION = "1.2.3c1"