I too have a BD-P1600 hooked up via hdmi to a Pioneer VSX-1018 using the dedicated blu-ray hdmi input. I was playing Golden Compass and the sound lagged quite noticeably behind the video. I went into the audio setting on the bd player and took all compressions settings out and it helped a little, but it was always there. This only happened with full 7.1 sound. I played No Country for old men and had no issues at all.
When I plugged it in and did the firmware update as suggested I found little or no difference. I tried various settings of the video, trying 1080i (my projector doesn't support 1080p) and thought maybe it was my projector, but seeing you have the same issue direct to a flatscreen, I think the problem lies with the player device. I will be monitoring this thread to see if anyone has any brilliant ideas for this because I really like the unit. I'm surprise more people haven't posted reports on this.
Oh, and the unit wouldn't play Iron Man. It would sit at Play: 0000 forever and wouldn't load the media. I have seen other people having difficulty playing bd media, primarily Bedtime Stories where the same thing happens. I got Netflix working which was strike three, so I'm down to 2 strikes an 0 balls.
I have a new BDP1600 player, connected via HDMI to Samsung LA55A950. No external amp involved. Both are new.
I seem to get variable audio sync problems, where the audio lags the picture. It is either VERY bad (2 seconds) to just bad (noticable, but watchable). I would have thought that two fairly new Samsung units would not have this issue. I have tries the BDp1600 on an LA46A950 also. Same problem. I have called support, and got the normal unplug the unit and plug back in.
Pressed the factory reset on the BD player. No luck.
I have tries to turn off as much processing as possible on the television. Nothing seems to work. Bought a new HDMI cable (v1.3 high speed). No luck.
Connected the unit to the television via Av Out, sync was fine but the picture was average.
Is this something that can be fixed with settings or am I stuck with new technology that just about works.
Its all a shame, as the picture is fantastic.