It seems like the Silverlight player in Firefox crashes on my Windows 7 machine when I try to go into full screen mode. The crash freezes the entire browser when I try to click yes on the prompt that asks for permission to run in full screen mode. We tested this on 2 machines in our office and the crash happens on both. IE and Opera run the player just fine. Any chance you can fix that (or even report it to the SL team if this is a plugin issue)?