Thread:Project:Support desk/Some text-replacements are not replaced

I quite freshly installed mediawiki (1.22.2) and have problems with some standard-text replacements. I think it could be connected to wgformattednamespaces...

Texts like:   

and many other wikieditor related texts are only displayed as the reference .. not the text.

Any idea where my problem could be located?

This is my software-set: Software	Version MediaWiki	1.22.2 PHP	5.3.28 (apache2handler) MySQL	5.5.43-0+deb7u1

Thanks, Jan