Index: wp-admin/nav-menus.php
===================================================================
--- wp-admin/nav-menus.php	(revision 18873)
+++ wp-admin/nav-menus.php	(working copy)
@@ -432,13 +432,12 @@
 if ( is_nav_menu( $nav_menu_selected_id ) )
 	$edit_markup = wp_get_nav_menu_to_edit( $nav_menu_selected_id  );
 
-function wp_nav_menu_max_depth() {
+function wp_nav_menu_max_depth( $classes ) {
 	global $_wp_nav_menu_max_depth;
-	return "menu-max-depth-$_wp_nav_menu_max_depth";
+	return "$classes menu-max-depth-$_wp_nav_menu_max_depth";
 }
+add_filter('admin_body_class', 'wp_nav_menu_max_depth');
 
-add_action('admin_body_class','wp_nav_menu_max_depth');
-
 wp_nav_menu_setup();
 wp_initial_nav_menu_meta_boxes();
 
Index: wp-admin/widgets.php
===================================================================
--- wp-admin/widgets.php	(revision 18873)
+++ wp-admin/widgets.php	(working copy)
@@ -22,7 +22,7 @@
 }
 
 if ( 'on' == $widgets_access )
-	add_filter( 'admin_body_class', create_function('', '{return " widgets_access ";}') );
+	add_filter( 'admin_body_class', create_function('$classes', '{return "$classes widgets_access";}') );
 else
 	wp_enqueue_script('admin-widgets');