A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: http://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: SELECT rev_id,rev_page,rev_text_id,rev_timestamp,rev_comment,rev_user_text,rev_user,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,page_namespace,page_title,page_latest FROM `wiki_page`,`wiki_revision` WHERE (page_id=rev_page) AND rev_id = '52' LIMIT 1
Function: Revision::fetchFromConds
Error: 1286 Unknown storage engine 'InnoDB' (localhost)