Preparing for 2.5b1.
diff --git a/Lib/idlelib/idlever.py b/Lib/idlelib/idlever.py
index b7deb3f..2064eb3 100644
--- a/Lib/idlelib/idlever.py
+++ b/Lib/idlelib/idlever.py
@@ -1 +1 @@
-IDLE_VERSION = "1.2a2"
+IDLE_VERSION = "1.2b1"