I have traced my problem with audio dropouts to an incompatibility(?) with my Denon AVR-591's Audyssey mode; if I disable Audyssey the dropouts stop. However, on the AVSforum 591 owner's thread they say this is a Tivo problem, that no one else is reporting this issue with Audyssey. I have previously posted on this but without any solution, http://www.tivocommunity.com/tivo-vb/showthread.php?t=487516 The issue only happens on some channels so I'm guessing that some DD5.1 signals are malformed and the Tivo Premiere doesn't handle them properly? I had previously diagnosed the issue as specific to my encrypted cable channels so maybe the issue lies there?