Some of the sites I visit have what I believe to be flash overlays on them. They are usually things like "tell us about your experience on our site" or the like. Not really ads, but they often don't scale right and jump off the screen when I zoom in to dismiss them. Is there an app that can block these, without disabling flash? WebMD is an example of a site that does this, after you load a few of their pages. Theirs stays put, but is an example of the feature.