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Hey all. I recently purchased a LG 47LM8600 and after calibration, I'm very pleased with the overall picture quality. However, I've noticed a slight discoloration coming from the left hand side (the discoloration only lasts for about and inch or two). I've done some picture tests, testing grey levels, and to the eye, the grey on the left definitely looks a little different than the grey on the right. Is this something common in LED displays? Is it possible that I have a defective set?

If there is a moving picture, it's very hard to notice this discoloration. It's mostly on solid colors, especially white and when browsing the web.

Thanks!