wp_footer hacked?

I’m using WordPress 2.1, and it looks like this code is putting a bunch of hidden spam links into the footer of my blog:

I’ve removed it for now… Comment if you’d like a copy of the spam links. Where did it originate?

Ack!! I just realized this must be the reason for all the “drug”-related AdSense ads that are appearing now. Ugh – WordPress security sucks. Keep on your toes with updates… that’s the only way to go. I’m on the latest 2.3.1 now.