diff --git admin_menu.css admin_menu.css
index b58a70e..7e4bbda 100644
--- admin_menu.css
+++ admin_menu.css
@@ -121,6 +121,7 @@ body.admin-menu {
 /* Third-and-above-level lists */
 #admin-menu .dropdown li li.expandable ul {
   margin: -20px 0 0 160px; /* LTR */
+  position: relative;
 }
 
 #admin-menu .dropdown li:hover ul ul,