Internet Explorer can suffer from something called "image flicker" it's when you roll over an image and it flashes white then reverts back to the image. It's a cacheing issue and it used to happen occasionally on the photos pages but today (hopefully) i've fixed it. Let me know if it is still doing it. If it has worked i'll fix it for anything else where it was a problem but it was the galleries that was the main one.

Argh, it's still foing it sometimes but less often so i think i'm on the right track.