Massively Screwed Up Permissions (?), Part 2

I don't actually know if this problem is related to permissions, but here's a big problem...

A user advised me that once you are what we call a Basic Member (i.e. a free member), you cannot upgrade on the Subscriptions page, though you *should* be able to. There are no buttons!

Gah!

See screenshot: https://skitch.com/internetmarketing/et4dg/subscriptions-ufo-ext-forum

Please advise. Thanks.