Yes I have the same infuriating problem. I have a UN46D6400 that had a wonderful, vibrant picture. After the firmware "update", it looks much worse. It's like looking through a film over the picture. Also now have vertical bands of light and dark across picture. Really not cool. It really shows up when displaying darker scenes. I have a theory - I think it could be some type of copy protection added in the new firmware to keep people from video recording the screen to pirate movies (just a theory at this point.) Have you found a solution?