Has any noticed any brightness shifting while watching Law and Order on HD TNT? I'm trying ti determine if it's a source, cablebox or my Panny causing the problem. I've also noticed it while watching MotoGP racing on Speed in standard def too. What I mean by brightness shift is while watching a scene, usually a dim courtroom scene, the brightness all of a sudden bumps up slightly and holds. I not longer have my CRT tv so I can't check if it's my cable box. I have DVR functions and when I rewind and play the same scene, the brightness shift repeats.