steve8383: how does it look using Google's browersize tool? It may look fine at your resolution but not at an average user's. I'd say keep all ads out of the 95% area using that tool and probably no more than one ad within the 50-60% block and see if that makes a difference. Unfortunately that likely means making a change that makes the site less monetized and waiting several weeks. I have a site where the content doesn't start until the 10% of browsers range with one ad block in the 90% area and it didn't get hit, but that may be a factor of the keywords it ranks for not being in the 1% affected. My intuition says if you got hit, get the ads out of the 90-95% area and try to move some body copy as high on the page as possible...and wait.