Even though I don't have the problem, I don't doubt that there is one.
I noticed that the default brightness setting (w/Auto Brightness), as with newer TVs, is too low. I turned mine up for awhile, then realized I prefer it around 50% for browsing in a room with low-med light. I have boosted brightness up to 70% in lit areas, but still didn't notice any warmth. But, again, I'm not gaming or watching HD movies, just browsing and reading.
When I ever get around to loading Netflix on it I'll test for heat. For some reason the app wouldn't download last night. It hung at the app store, and I tried several times.