Can you give a bit more information about what you are doing when you encounter this problem? Specifically, how many photos are you attempting to use in Slideshow when the hang happens? Do you see a progress bar at any point indicating that it is building out your slideshow, or are you just getting a black screen? What happens if you create a collection of only a couple photos and then attempt to use Slideshow? Any other information you can provide that you think is pertinent would be greatly appreciated. Thanks.