The advertising  banner hangs down in front of images that are displayed full size. This is a recent development. It happens with both Firefox and Safari. This is extremely annoying and it makes me want to do nasty things to the advertisers, not patronize them. From the little I know about CSS, it would seem that the layer priority for the banner has been set higher than the image.

I see from other threads that a similar problem affects the forum pages. The same 'feature' might be responsible for both problems.