I have the lip sync problem too and based on my search for an answer there are lots of people who have this problem. The one workaround I have found is turning off the Dolby sound output from my directv box and changing it to PCM. Of course this means I have no Dolby sound to go along with the beautiful picture, but at least the sound is not 5 seconds behind that picture. It sure would be nice if someone from LG would post something about this, if not a solution then at least an explanation of the problem.