--- modules/system/system-behavior.css	2010-05-03 08:46:14.731058619 +0200
+++ modules/system/system-behavior-new.css	2010-05-03 08:51:18.079060450 +0200
@@ -299,7 +299,7 @@ html.js .js-hide {
  * causes issues for keyboard only or voice recognition users.
  */
 .element-invisible {
-  height: 0;
-  overflow: hidden;
   position: absolute;
+  clip: rect(0px, 0px, 0px, 0px);
+  overflow: hidden;
 }