Running 1.22.0 on CentOS with PHP 5.3.3 Followed all instructions with a git clone of the primary release, not the branches.
Special:CheckUser Exception from line 376 of /etc/mediawiki/includes/SpecialPage.php: Call to undefined method CheckUser::getPageTitle
Try cloning the 1.22 branch of CheckUser. It's not a very good idea to use a bleeding edge extension with an older version of MediaWiki.
I will try this, but 1.22 is listed as the current WikiMedia release...
(please read Wikipmediawiki)
I thought you cloned the master of the CheckUser extension.
