My account is crosswired with someone else

My account (@billder) is now somehow tied with another (@fairminder).

twitter.com/billder shows @fairminder.

I can't log in as myself. I've reset my pwd, but I think I reset @fairminder's pwd.

My last tweet ("bringing home the bacon, metaphorically") shows up as from @fairminder in friend's twitterstreams, yet displays correctly as me in Twitter search.

I did install a new GreaseMonkey script earlier (UTF character, or something), but that was a while before my acct got borked. I disabled all GM user scripts.