About an hour ago I turned on my Xbox and was greeted with a mandatory Xbox Dashboard update. The update was pretty short, nowhere near as long as the NXE update, but I have no idea what the update was for. We’re talking about it over at the Major Nelson Chatroom right now; some people have been prompted for the update, and others haven’t. Major Nelson, the typical source of information for such updates, has not said a single word about it. I also haven’t found any information out there on the blogosphere. So, have you been prompted for this mystery update? We’ll keep you posted when we find out what it was for.