for those who still have this issue and for those who have had the issue resolved please post the model info of your TV / and/or A/V receiver.
we need to determine the affected equipment
I thought my issue had fixed itself but it is back. My DVR is a 7216, tv is Samsung 46a650 and the receiver is a Yamaha HTR-5760. Only the optical audio to the receiver is the problem. HDMI to the TV works fine, although I don't use that audio.
I have a Sony Bravia KDL-46XBR6 HDTV and a matching Sony Bravia Surround System. Everything is HDMI.
The sound from programs frequenty drops in and out. I did a firmware upgrade on the TV which was posted
on the Sony site.I too get the audio lag.
Sony HT-CT100 Soundbar/Receiver with 3 HDMI's and no component inputs
Problems with audio and video after 1.6.1 kept coming back. I switched to component cables and optical audio about five days ago and have not had a single problem other than the picture is now somewhat softer than it was with HDMI and of course I now look at more cables hanging out the back.