Why is PSA ad showing on my blog?

Chocolate banana cake, originally uploaded by 5xmom.

Why am I seeing PSA ads? I notice this has been going on for several weeks already. Previously, my personal blog was hit with wordpress spam injection. Some asshole hacked my server, add in the hidden codes and my blog was linked to ‘bad’ sites.

I didn’t know about it because I cannot see the links. Lucky, Google Adsense was nice and told me about it. I had to hire someone to help to locate the problem. Now, it looks like the same thing has happened over here. I hope I don’t need to spend money to solve it again.

It is such a pain. I hate it when I have problems I cannot solve on my own.