I am from Canada, and because of this, I am unable to watch videos from ABC. (Which is stupid in my opinion, but that's another topic <g>)
However, I did not know this at tried to watch something from ABC. Boxee (Windows Alpha) went to the loading bit (star thinger on screen) and hung there forever. I could not escape it and only closing Boxee seemed to work. There should be some method of detecting this condition and informing the user that the video is unavailable.