I have a htpc with two FireDTV S2. I have uppgraded to the latest version of MP and suddenly I got problem. Very often when I change to another channel MP locks the computer and I have to restart. After resart MP says there no tuners avaible and I must reinstall the tuners and after that make a new restart for MP to find the tuners. Is this a bug or is there a change in MP so that it no longer works with this older tuners?