First things first... Live in Albuquerque, NM Tivo Series 3 Comcast (2 cable cards) I was one of the "first adopters" of the Series 3 HD Tivos. I went through hours of frustration with Comcast before finally pairing the cable cards up correctly. It's been a "dream" up until now. It appears that "something" has changed. I'm guessing it's a Tivo software issue as I didn't have a problem until lately. I do not get sound on ANY of my digital channels as of this week. I went into the Tivo settings menu and switched my Dolby setting to the Dolby Digital to PCM: Messages and Setup > Settings > Audio > Dolby Digital Then put the checkmark next to "Dolby Digital to PCM" as opposed to where it used to be (Dolby Digital). I now get sound on the digital channels but cannot use our 5.1 surround. Anyone have this issue and figure out some way to keep good sound? Thanks!