This is my third DLP and I've never had any problem like this before. It's like somebody has a flashlight behind the black bars and is shining it through. It moves, depending on how bright the picture is below the bar. For instance, if a guy is standing in the picture with dark hair and he's standing in front of a white background, the bar will be almost gray (halfway up the bar), then be black above the guy's head, then go back to gray. But it's not a solid gray, it's uneven. I'll try and snap a pic.