CBS HD in Portland sucks. They were the first of the big 3 to hit the air in HD in my area. The hardware they originally spec'd can't transmit 5.1, so they use the mixed down stereo feed from CBS. There's been a bunch of audio issues with CBS HD in our area. We usually have to run in stereo only mode because PLIIx doesn't work well with their audio feed. Maybe one day our local affiliate will at least rise to the poor standards that CBS corporate has.