Thread:Project:Support desk/Moving mediawiki 1.10.0 from Windows 2003 server to RHEL 6 server/reply (6)

Looks better than before.

The version of the extension "Newest page", which you are using, obviously is not compatible with MediaWiki 1.21. Try the newest version from Extension:Newest_Pages. However, that one also might be not working - the last real update was in January 2012; just try and see, if it works.