Index: modules/system/system.css
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.css,v
retrieving revision 1.53
diff -u -r1.53 system.css
--- modules/system/system.css	5 Dec 2008 12:50:28 -0000	1.53
+++ modules/system/system.css	1 Feb 2009 02:54:20 -0000
@@ -342,10 +342,6 @@
 html.js fieldset.collapsible legend a {
   display: block;
 }
-/* Avoid jumping around due to margins collapsing into collapsible fieldset border */
-html.js fieldset.collapsible .fieldset-wrapper {
-  overflow: auto;
-}
 
 /*
 ** Resizable text areas