account was hacked, tweet posted in spanish under my account.

I had a large number of people unfollow me (NotoriousBIG) the other day when somebody posted a tweet in spanish under my account.

i didn't post this message, and it has seemingly been deleted, but it showed up in my socialtoo follow/unfollow reports, and a friend saw it at the time, so i know it happened.

the message was: "@bertop he leido que ests enganchado a los .mkv , de donde los sacas?! Llevo 2 semanas buscando El club de la lucha!!"

i did change my password, but i'm concerned about the continued security of my account.

i also did a twitter search for that tweet, and this is what I got:

http://search.twitter.com/search?q=le...

seems other people are having the same problem.