Love my new Premiere4 since I got it back in June. I run my Tivo via HDMI to a Panasonic ST60 plasma for video & optical cable to a Sony receiver for the audio portion. I set the receiver to TV+AMP. This way I have the option of watching TV(TiVo) with or without the receiver as a sound carrier. Occasionally when I change channels or video content from menu there is a sudden pop sound that goes off before the real content audio picks up. Is this a HDMI handshake issue or something else?