Oh dear, I appear to have messed things up.
I'm migrating away from the email address I originally registered with. The new email has already been added to my Launchpad account and Ubuntu One's SSO (but I can't remember if I set it as preferred). I attempted to add the new one via my forums Settings > edit email and password, but it wanted me to activate my account. Since I already have an account I didn't take that step, but I've lost my avatar and privileges (to re-add the avatar).
Help would very much be appreciated!