I have an XL4 and a 4 tuner Premiere 4. All has been fine and I do not have the update yet. Last night we wanted to watch a show on the XL4, on the other Premiere and I would get freezes, and no audio. I would back it up, and the sound would return for a few momoents. This morning I went to the Source...XL4, and the shows we tried were OK. Network, hard wired, is fine and this never happened before. Should I reboot? Just wonder why this would happen all of a sudden?