Must... control... fist of death...
"I know that was supposed to be camera-ready, but I don't know how to do that right, so I sent you something you could fix. Oh, I didn't tell you that before you went to press? Well from now on, just fix all my 'camera-ready' ads before you print them, and it'll be fine. And call me if you have any other graphics problems, I have years of experience in this field."