User blog comment:Cartoon-44/Join the force against the move./@comment-3235402-20120510143141/@comment-3235402-20120511001053

It ordinarily says "Community messages has been updated," though the admins can edit it to say anything, and it's triggered by editing the Community Corner (which nobody paid attention to, which is why we don't really use it anymore).

It seems I'm pretty much the only one who uses it though. :P