Just out of curiosity, what graphic cards are you gents (related to the black screen) using? Maybe it is just a driver problem and not really related to Glass. I also faced that issue and after i downlaoded the latest graphic card drivers off my manufactors homepage i fixed that issue. I was using the graphic card drivers windows delivered me due updates before. It's worth a try - good luck. BTW: I can't wait to see the final release of this awesome tool coming