It's advertising, it happens every now and again, but if you have AdBlock it will only be black no ads, but if you don't there should be an ad for something.
the image shows an ad from about 6mponths ago (there have been more though)
It's an advertisment for Lexus convertibles! You're probably seeing black because you have the ad blocker program, I don't. Fanpop does full page advertisment some times, it's happened before. It will retreve to it's regular white backround in a couple days or so.
