I think it happened after the latest software update. I loved the 'floating photo' screensaver (the one with the photos raining down vertically on the screen). Now, it just does a blank screen. If I request a "preview" of the screensaver or let it time out. It's just blank. It doesn't matter whether I have my photos or Apple's default photos selected either. The slideshow screensaver still works, so I'm using that now, but want the other back! Anyone else experiencing this?