How can it be a source issue with so many people complaining?. unless my LG-BD390 is at fault too and every one else that has complained of this has faulty source devices.
OR, it could be the HDMI cables we are using. I use a rocketfish (from best buy) that is 12' long. It claims to support "120Hz and lipsync", which is version 1.3. I even called the rocketfish support line and the lady said it is a version 1.3 cable.
Regarding the sync fix, instead of telling people to search for it:
The fix is in blue:
http://www.avsforum.com/avs-vb/showt...7#post17087317
^ That is the *LH90 thread.
Here is another thread that might get added to:
http://www.avsforum.com/avs-vb/showt...1158841&page=2
One person said on 8/30/09 that he is waiting on a firmware fix from LG.
I am going to try the menu tweak this weekend hopefully.
Again, My setup does fine with not sending audio through the TV. But it'd be a whole lot easier if it just worked.

LG really dropped the ball on this one. how on earth could you release a TV without testing it against some of the leading DVR boxes out there? My Best buy here has had a handful of returns due to lyp sync and I bet they'd have more if people used the set's TV speakers, but most higher end sets at least have 5.1 surround.