I bought a 55" LM 7600 on Friday, and I have a band along the top of the screen that is lighter than the rest.
For example, and entirely blue background would be slightly ligher blue for about a 0.5cm strip along the top of the TV.
You can see it a bit in the first photo, and it's really bugging me. It's not the source content, as it happens with TV, DLNA, PC, etc.
Other than that, i've got the settings so it's a fantastic picture, and pleased with it in other respects.
There's a fair bit of relection in this, but you can see what i mean
And a couple of ones in the dark so you can see the bleed.
Strangely, all the big "flashlighting" from the corners doesn't bother me at all - but that's because it isn't at all noticeable when you're playing films /games / etc. It's just the strip along the top