I downloaded the program, since I don't have a GPS I set it to 00:00:00:00:00:00, set the URI as in the sample, and Voila! a map of the world appeared. I zoomed into San Antonio, Texas and right down to street level in my neighborhood. I was amazed! But once I ended the app, and later ran it again, it does not work. All that I get is a progress bar saying "downloading maps" but it is just a black screen. I can zoom up or down but still only see a black screen. I tried removing, and reinstalling the app, with no success. Any suggestions, Ireally want this to work. I am OS X savy, but limited Linux knowledge. Thanks.