Index: wp-admin/js/nav-menu.dev.js
===================================================================
--- wp-admin/js/nav-menu.dev.js	(revision 14252)
+++ wp-admin/js/nav-menu.dev.js	(working copy)
@@ -160,6 +160,9 @@
 			setupListItemsDragAndDrop.call(this, menuList); 
 
 			postboxes.add_postbox_toggles('nav-menus');
+			postboxes.pbshow = function(id){ $('#'+id+" .inside").slideDown('fast'); };
+			postboxes.pbhide = function(id){ $('#'+id+" .inside").slideUp('fast'); };
+			$("#menu-settings-column .postbox").not(".closed").children(".inside").show();
 		},
 		
 		attachMenuEditListeners : function() {
Index: wp-admin/css/nav-menu.dev.css
===================================================================
--- wp-admin/css/nav-menu.dev.css	(revision 14252)
+++ wp-admin/css/nav-menu.dev.css	(working copy)
@@ -21,6 +21,9 @@
 #menu-settings-column .inside {
 	padding:0 10px;
 }
+	.js #menu-settings-column .inside {
+		display: none;
+	}
 
 #menu-settings-column .handlediv {
 	background: url("../images/menu-bits.gif") no-repeat scroll 0 -110px;