diff --git a/themes/base/jquery.ui.button.css b/themes/base/jquery.ui.button.css
index 0d11065f4..2ae50afd1 100644
--- a/themes/base/jquery.ui.button.css
+++ b/themes/base/jquery.ui.button.css
@@ -7,7 +7,7 @@
  *
  * http://docs.jquery.com/UI/Button#theming
  */
-.ui-button { display: inline-block; position: relative; padding: 0; margin-right: .1em; text-decoration: none !important; cursor: pointer; text-align: center; zoom: 1; overflow: visible; } /* the overflow property removes extra width in IE */
+.ui-button { display: inline-block; position: relative; padding: 0; margin-right: .1em; text-decoration: none !important; cursor: pointer; text-align: center; zoom: 1; overflow: hidden; *overflow: visible; } /* the overflow property removes extra width in IE */
 .ui-button-icon-only { width: 2.2em; } /* to make room for the icon, a width needs to be set here */
 button.ui-button-icon-only { width: 2.4em; } /* button elements seem to need a little more width */
 .ui-button-icons-only { width: 3.4em; }