The ‘Development’ category  in the Wiki gives me a database error.
Database error Jump to: navigation, search A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function "Category::refreshCounts". Database returned error "1: ERROR: syntax error at or near "LOCK" LINE 1: ... 'Development' AND (page_id = cl_from) LIMIT 1 LOCK IN SH... ^".
The other tested category links are working fine.
(from redmine: issue id 2087, created on 2013-06-15, closed on 2013-08-06)