Ticket #23316: 23316.2.patch

src/wp-admin/includes/plugin.php

@@ -1052 +1052 @@
 
         $new_menu = array( $menu_title, $capability, $menu_slug, $page_title, 'menu-top ' . $icon_class . $hookname, $hookname, $icon_url );
 
-        if ( null === $position )
+        if ( null === $position ) {
                 $menu[] = $new_menu;
-        else
+        } else if ( isset( $menu[$position] ) ) {
+                $position = $position + substr(base_convert(md5( $menu_slug . $menu_title ), 16, 10) , -5) * 0.00001;
+                $menu["$position"] = $new_menu;
+        } else {
                 $menu[$position] = $new_menu;
+        }
 
         $_registered_pages[$hookname] = true;