Thread:Project:Support desk/Embedded file link doesn't work

After upgrading mediawiki from version 1.6 to version 1.21.1, all file links (File:example.png) do not work. When links are changed to Image:example.png they do work.

versions: MediaWiki 1.21.1 PHP	  5.4.19 (apache2handler) MySQL	  5.5.32