Yes I am - 4.0.1
But i do see what we are talking about here. I don't think the browser window going black while running in full screen mode is a bug. I think this happens when Silverlight runs in full screen mode. IE, Chrome and Firefox all do the same thing.
When i run a presentation in Firefox, it immediately switches to full screen mode. I don't even see the black screen (and then will only see it if i Alt+Tab out of it)
From the earlier post, I don't understand you comment Avinash: "I minimised the browser window and saw the presentation running in fullscreen in the background." Are you saying that when you run the presentation it doesn't immediately switch to full screen mode?
Mike