Index: wp-admin/css/admin-menu.css
===================================================================
--- wp-admin/css/admin-menu.css	(revision 28513)
+++ wp-admin/css/admin-menu.css	(working copy)
@@ -294,6 +294,10 @@
 	color: #fff;
 }
 
+#adminmenu .wp-submenu li.current{
+	position: relative;
+}
+
 #adminmenu .wp-not-current-submenu li > a,
 .folded #adminmenu .wp-has-current-submenu li > a {
 	padding-right: 16px;
@@ -419,8 +423,7 @@
 	position: relative;
 }
 
-ul#adminmenu a.wp-has-current-submenu:after,
-ul#adminmenu > li.current > a.current:after {
+ul#adminmenu li.current a.current:after {
 	right: 0;
 	border: solid 8px transparent;
 	content: " ";