I've managed to get around it by restoring the backup on your 8.0.0 build and then updating to the November 25th devel. But even after restoring the backup some settings are lost. Time zone, location, weather. Small crap. I have not noticed any sound issues yet. I tired steaming couple episodes of a show from my server and everything seemed fine. I don't play any games on the box, and don't plan on it.
Again, thanks for making the builds!