I have just replaced my old Panasonic plasma TV with an LG 49SJ800V LED. When playing standard def DVDs on my Panasonic Blu-ray player (DMP-BD80) I notice a very slight lip synch problem between video and audio. This never happened when using the plasma. It is very slight I have to admit but just enough to be noticeable and very annoying! The only thing that is slightly different from the previous set up is I am using a cheaper quality HDMI cable but surely that would not be the cause?