diff -r 03af0d16c328 Lib/idlelib/configHandler.py
--- a/Lib/idlelib/configHandler.py	Mon Mar 26 22:14:13 2012 +0300
+++ b/Lib/idlelib/configHandler.py	Wed Mar 28 14:05:58 2012 -0500
@@ -596,7 +596,7 @@
             '<<replace>>': ['<Control-h>'],
             '<<goto-line>>': ['<Alt-g>'],
             '<<smart-backspace>>': ['<Key-BackSpace>'],
-            '<<newline-and-indent>>': ['<Key-Return> <Key-KP_Enter>'],
+            '<<newline-and-indent>>': ['<Key-Return>', '<Key-KP_Enter>'],
             '<<smart-indent>>': ['<Key-Tab>'],
             '<<indent-region>>': ['<Control-Key-bracketright>'],
             '<<dedent-region>>': ['<Control-Key-bracketleft>'],