Index: typo3/js/modulemenu.js
===================================================================
--- typo3/js/modulemenu.js	(revision 3236)
+++ typo3/js/modulemenu.js	(working copy)
@@ -53,7 +53,20 @@
 	 */
 	registerEventListeners: function() {
 		$$('#typo3-menu li.menuSection div').invoke('observe', 'click', this.toggleMenu);
+		if(Prototype.Browser.IE) {
+				//mouseenter and mouseleave are only available but thats our target
+			$$('#typo3-menu li.menuSection li').invoke('observe', 'mouseenter', this.toggleHoverClass);
+			$$('#typo3-menu li.menuSection li').invoke('observe', 'mouseleave', this.toggleHoverClass);		
+		}
 	},
+	
+	/**
+	 * toggles the hover classname for IE menu hover support
+	 */
+	toggleHoverClass: function(event) {
+		var menuItem = Event.element(event);
+		menuItem.toggleClassName('hover');
+	},
 
 	/**
 	 * toggles the associated submodule menu when clicking a main module header
Index: typo3/css/modulemenu.css
===================================================================
--- typo3/css/modulemenu.css	(revision 3236)
+++ typo3/css/modulemenu.css	(working copy)
@@ -50,17 +50,12 @@
 }
 
 #typo3-menu li span.submodule-icon {
-	display: inline-block;
-	display: -moz-inline-box;
+	display: block;
+	float: left;
 	width: 20px;
 	vertical-align: top;
 }
 
-/* IE needs a special treatment */
-* html #typo3-menu li span.submodule-icon {
-	margin-right: 3px;
-}
-
 #typo3-menu li ul li {
 	font-weight: normal;
 	width: 138px;
@@ -71,17 +66,13 @@
 	height: auto;
 }
 
-/* IE needs a special treatment */
-* html #typo3-menu li ul li {
-	height: 16px;
-}
-
 #typo3-menu li ul li a {
 	text-decoration: none;
 	display: block;
 }
 
 #typo3-menu li.menuSection li:hover,
+#typo3-menu li.menuSection li.hover,
 #typo3-menu li.highlighted {
 	background-color: #e3dfdb;
 }
Index: typo3/sysext/t3skin/stylesheets/modulemenu.css
===================================================================
--- typo3/sysext/t3skin/stylesheets/modulemenu.css	(revision 3236)
+++ typo3/sysext/t3skin/stylesheets/modulemenu.css	(working copy)
@@ -22,6 +22,7 @@
 }
 
 #typo3-menu li.menuSection li:hover,
+#typo3-menu li.menuSection li.hover,
 #typo3-menu li.highlighted {
 	background-color: #d7dbe2;
 }