I Came Here To Be Podkilled, Dammit, Not Hacked

I've taken to logging into EVE in the mornings and doing my PI then. I started doing this when I decided to do two 5-hour cycles per day rather than one 23 hour. (more stuff is extracted that way, and I wanted a cushion.) My evenings are more flexible that way.

So yesterday morning I logged in, cycled all my extractors (23-hour cycles, I have my cushion now) and then clone jumped to Empire. Finally all the wardecs against us had expired, and I needed some skill books. Got the book, started my training and logged out and went to work.

This morning I attempted to login but could not. Some poking about on the CCP website revealed that my account had been banned. Say what?

In my email this morning, now that I'm at work.

2010.11.23 10:52:00 GM Nova
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Hi,

This mail is sent to inform you that your EVE Online account, has been closed as the account security is compromised.

It appears that hackers have gained access to your account and have in all likelihood robbed it of ISK. Please reply to this email in order to open the account again and make sure to clean your PC of keyloggers and trojans before accessing the account again.

Regards,
GM Nova
Senior Game Master
EVE Online Customer Support

Best I can figure is that they got the userid/password from a forum somewhere.