since 0.84, the "avatar theft" warning sometimes comes up when starting interface, even though the avatar really is your own. clicking the "change avatar" link on the warning reveals that something is really wrong, displayname is "ThisIsDisplayName" and favorites & avatar path is blank.

on the upside, the avatar itself loads correctly .-)

note: a few times I had this happen alongside the "Interface fails to load scripts" bug so they may be related or similar.