SourceForge and the lost of Hosted Apps
As a SourceForge fan and user I’m a bit sad but I think it is a right decision. The old hosted apps service never gives you the necessary access and space to do something like to add a new extension into your MediaWiki instance. Now (in fact you could even do it sooner) you can start your own hosted app in your own project-web space. I have done it and merged my old wiki (https://sourceforge.net/apps/mediawiki/pear3dengine/) to a new point (http://pear3dengine.sourceforge.net/wiki/).
But there is one very big problem… SourceForge allows only 16 Mb PHP memory space… this is not enough and the reason for the bad links  in the wiki. Hopefully they promised to work on the MediaWiki issues. So I’m looking forward!
PS: The old wiki links are now broken, I will change every link to the new url soon.