I own a 65" Mitsubishi 1080p DLP. For some time now, I've been noticing a "bruise" on the upper right portion of the screen. It's very light, almost like dirt on the screen, and it's in the shape of like a vertical pair of lips. It's only noticeable on bright backgrounds, especially when the image is panning. It's not a big deal, but it's getting to be annoying now. I have a 4 year warranty on the TV, but I hate to get repair people out here for something so subtle. Wondering if anyone has had similar troubles.