Hello, this is also happening to me! I don't have any sort of transition between my photos. The first photo shows up fine when the slideshow starts, and then the next photo is on top of the other one but smaller, and then the next photo is fine with a white background, and then the next one is on top of that one, and so on! How do I stop this from happening? It never use to do it... Everything else works great. I have version 6.0.4 (797). And I am running on Snow Leopard.