Does anyone else have a problem with the sound quality? The stations all sound pretty bad to me. Like listening to an mp3 recorded at a low bit rate. Audio on other TV programs are fine. I ususally listen to internet radio over a Roku Soundbridge and the quality on it is excellent. What gives? I also notice the screen jerking/shifting slightly when viewing some of the new features (games, etc). Is this a result of using my wireless network?