Index: wp-admin.dev.css
===================================================================
--- wp-admin.dev.css	(revision 18737)
+++ wp-admin.dev.css	(working copy)
@@ -132,9 +132,7 @@
 
 .inner-sidebar #side-sortables {
 	min-height: 300px;
-	min-width: 280px;
-	max-width: 480px;
-	width: auto;
+	width: 280px;
 }
 
 .wide-window .inner-sidebar #side-sortables {