This has been happening to a whole load of pictures I've had up, but this really shocked me. I went back to the guy's site that I originally borrowed the image from, and the closest I could find now is this where a dress has been painted on to cover both breasts.
Nudity is one of those things. You're either bothered by it or not. But I can't help but think this is taking things entirely too far. Way to go Imageshack. Back to my long ongoing search for a less bigoted image hosting provider.