Forum selections in MCP queue not working

-> 'Approve Details' for any topic/post

-> (dis-)approve topic/post

-> confirm

-> return link sends you back and sets the forum_id (var 'f') to the one of the post/topic you just (dis-)approved

-> only topics/posts from that forum should be displayed: instead there are no topics/posts at all (not even from that very forum)

-> switch back to "All forums"

-> topics/posts appear again