rique, i've left a note for alex in the mod forum, hopefully he'll check in soon and give us an answer. it's quite possible i misunderstood the minimum number of posts ; the last person who had this problem discovered the signature was activated after reaching 30 posts, it's possible it was activated earlier and she didn't notice, or possibly that is the real limit...
further updates as soon as i have more info.
are you enjoying your 505 ?