Index: misc/vertical-tabs.css
===================================================================
RCS file: /cvs/drupal/drupal/misc/vertical-tabs.css,v
retrieving revision 1.8
diff -u -p -r1.8 vertical-tabs.css
--- misc/vertical-tabs.css	7 Oct 2010 15:54:13 -0000	1.8
+++ misc/vertical-tabs.css	13 Nov 2010 07:44:06 -0000
@@ -67,11 +67,14 @@ div.vertical-tabs {
  * with "box-sizing" to prevent box model issues from occurring in most browsers.
 */
 .vertical-tabs .form-type-textfield input {
-  width: 100%;
+  max-width: 100%;
   -moz-box-sizing: border-box;
   -webkit-box-sizing: border-box;
   box-sizing: border-box;
 }
+* html .vertical-tabs .form-type-textfield input {
+  width: 100%; /* IE6 */
+}
 * html .vertical-tabs .form-type-textfield,
 * html .vertical-tabs .form-textarea-wrapper {
   width: 95%; /* IE6 */