Audio/Lip Sync on Panasonic BD-30

[Mission1979]

Hi there,

I've had my setup going now over a week, its all new by the reciever mainly BD-30 into a Panasonic Th46PZ85, with a yamaha RXV-650 amp. HDMI BD to TV, CO-AX to amp.

The problem i'm having is the Audio goes out from the picture throughout the film at the beginning it can be out or okay, but during the film the audio lipsync goes out and comes back again.

If it was constant I could understand it would be a matter of adjusting delays.

It seems most obvious on ID4, WAR and Almost famous so far. I've only watched a few films. Golden Compass was the first and I didn't notice anything or in U-571. DVD's seem perfect all the time, thus pointing me away from any delay solution.

Please help as I am at my wits end, and its spoiling the experience.

Thanks in advance

Tim