Index: modules/system/system-behavior.css
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system-behavior.css,v
retrieving revision 1.6
diff -u -p -r1.6 system-behavior.css
--- modules/system/system-behavior.css	9 Mar 2010 11:45:37 -0000	1.6
+++ modules/system/system-behavior.css	13 Mar 2010 17:37:33 -0000
@@ -303,7 +303,10 @@ html.js .js-hide {
  * causes issues for keyboard only or voice recognition users.
  */
 .element-invisible {
-  height: 0;
-  overflow: hidden;
   position: absolute;
+  left: -10000px;
+  top: auto;
+  width: 1px;
+  height: 1px;
+  overflow: hidden;
 }