Index: src/wp-admin/includes/plugin.php
===================================================================
--- src/wp-admin/includes/plugin.php	(revision 35471)
+++ src/wp-admin/includes/plugin.php	(working copy)
@@ -1052,10 +1052,14 @@
 
 	$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;