Index: wp-admin/css/wp-admin.dev.css
===================================================================
--- wp-admin/css/wp-admin.dev.css	(revision 19284)
+++ wp-admin/css/wp-admin.dev.css	(working copy)
@@ -1776,10 +1776,11 @@
 }
 
 .wp-menu-arrow,
-.folded #adminmenu li.menu-top:hover .wp-menu-arrow {
+.folded #adminmenu li.wp-has-submenu:hover .wp-menu-arrow {
 	display: none;
 }
 
+.folded #adminmenu li.menu-top.current:hover .wp-menu-arrow,
 .folded #adminmenu li.menu-top.wp-menu-open:hover .wp-menu-arrow {
 	display: block;
 	z-index: 125;
@@ -1849,7 +1850,8 @@
 	margin-top: 3px;
 }
 
-.folded #adminmenu .wp-has-current-submenu {
+.folded #adminmenu .wp-has-current-submenu,
+.folded #adminmenu .current {
 	margin-bottom: 1px;
 }