Ticket #19586: 19586.patch

wp-admin/css/wp-admin.dev.css

@@ -1506 +1506 @@
         z-index: 1001;
 }
 
+html.ie8 #adminmenu li.menu-top:hover .wp-menu-arrow {
+        display: none;
+}
+
 #adminmenu .wp-menu-arrow div {
         position: absolute;
         top: 7px;