Anon. You are so onto something there. Of course, I've been using the same email account for ALL my crypto accounts. BTW, they also got my bter and MtGox accounts but they had virtually nothing in them so I didn't mention in my earlier post. So all they had to do was crack one account and they had them all. You sir are a genius. That explains the password change confirmation emails from bter and mtgox.
Sooo. If you are into crypto, nothing should be linked. Every account should have a separate email address and p/word. It cost me but I've learnt the lesson.
EDIT: They still have control of my Cryptsy account. Every time I change the password there, next time I log in it is invalid. They must be hoping that I've still got miners auto depositing to that account. As if..
Were you using the same email address? Maybe they've hacked it and used the password recovery function to change both passwords.