MediaWiki 1.22.2 / PHP 5.3.10 (apache2handler) / MySQL 5.5.20
Some Special:* pages won't display in version 1.22.2, especially Special:SpecialPages. The only sign of a problem is the following message in Apache error log:
[Wed Feb 12 13:08:59.451552 2014] [core:error] [pid 4052:tid 764] (20024)The given path is misformatted or contained invalid characters: [client 192.168.1.104:61178] AH00127: Cannot map GET /wiki/Special:SpecialPages HTTP/1.1 to file
Some Special: pages seem OK such as Special:ListUsers or Special:Version, others just won't display at all.