Can't unsubscribe from an archived forum

[jrp]

When a good sized chunk of the uplink reports were archived recently, I decided to unsubscribe from that forum. Normally in forum tools you have four options while viewing a subscribed forum: Post a new thread…, Mark this forum read, Unsubscribe from this forum, and View parent forum. In a forum that you subscribe to and has now been archived or locked, only two options remain: Mark this forum read and View parent forum. It isn't a big deal, but I'd like to clean up my subscription page.

Mac OS X 10.6.8 and Firefox 16.0.1.