Index: includes/admin.menu.css
===================================================================
--- includes/admin.menu.css	2010-08-06 18:10:34.000000000 +0200
+++ includes/admin.menu.css	2011-03-18 09:24:02.000000000 +0100
@@ -25,12 +25,12 @@
 
 div#admin-toolbar span.menu-description { display:none; }
 
-div#admin-toolbar a.menu-hover span.menu-description {
+div#admin-toolbar .menu-hover span.menu-description {
   color:#ccc;
   display:block;
   }
 
-div#admin-toolbar.vertical a.menu-hover span.menu-description {
+div#admin-toolbar.vertical .menu-hover span.menu-description {
   position:absolute;
   overflow:hidden;
   left:0px;
@@ -40,7 +40,7 @@
   height:90px;
   }
 
-div#admin-toolbar.horizontal a.menu-hover span.menu-description {
+div#admin-toolbar.horizontal .menu-hover span.menu-description {
   position:absolute;
   top:0px;
   left:60%;
@@ -89,6 +89,7 @@
   #admin-toolbar ul.drilldown-active-menu li.leaf { background:url(../images/sprite.png) 0% -110px no-repeat; }
 
 #admin-toolbar ul.menu li a {
+  border-radius:5px;
   -moz-border-radius:5px;
   -webkit-border-radius:5px;
 
Index: includes/admin.menu.js
===================================================================
--- includes/admin.menu.js	2010-08-01 07:07:31.000000000 +0200
+++ includes/admin.menu.js	2011-03-18 09:22:11.000000000 +0100
@@ -13,17 +13,10 @@
           menu.addClass('admin-toolbar-menu-hover');
           $('a:has(span.menu-description)', menu).hover(
             function() {
-              $('<a></a>')
-                .attr('class', $(this).attr('class'))
-                .addClass('menu-hover')
-                .append($('span.menu-description', this).clone())
-                .appendTo(menu)
-                .show();
+              $('div.menu-hover .menu-description').text($('span.menu-description', this).text());
             },
             function() {
-              $(menu)
-                .children('a.menu-hover')
-                .remove();
+              $('div.menu-hover .menu-description').text('');
             }
           );
         }
Index: theme/admin-toolbar.tpl.php
===================================================================
--- theme/admin-toolbar.tpl.php	2010-07-31 23:12:14.000000000 +0200
+++ theme/admin-toolbar.tpl.php	2011-03-18 09:20:13.000000000 +0100
@@ -13,6 +13,9 @@
         <div class='block-content clear-block'><?php print $block->content ?></div>
       </div>
     <?php endforeach; ?>
+    <div class="menu-hover">
+      <span class="menu-description"></span>
+    </div>
   </div>
 
 </div>