Index: modules/system/system-behavior.css
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system-behavior.css,v
retrieving revision 1.9
diff -u -r1.9 system-behavior.css
--- modules/system/system-behavior.css	28 Apr 2010 20:08:39 -0000	1.9
+++ modules/system/system-behavior.css	14 Jun 2010 15:17:21 -0000
@@ -299,7 +299,14 @@
  * causes issues for keyboard only or voice recognition users.
  */
 .element-invisible {
-  height: 0;
-  overflow: hidden;
   position: absolute;
+  clip: rect(0, 0, 0, 0);
+}
+/* IE7 */
+*:first-child + html .element-invisible {
+  clip: rect(0 0 0 0);
+}
+/* IE6 */
+* html .element-invisible {
+  clip: rect(0 0 0 0);
 }