Thread:Project:Support desk/User preferences won't save (no error)

MediaWiki 1.16.0 PHP 	5.2.10 (apache2handler) MySQL 	5.0.77-log http://www.svencoop.com/wiki/

For some reason, User Preferences will not save. Clicking 'Save' just returns you to Special:Preferences, without any changes having taken effect.

Everything else seems to work without problems. Pages can be created and edited, users can be created and have their usergroups changed, etc. Have tried re-installing with all default settings, changing various settings, etc. Unfortunately I cannot access the server logs.