I read on the long original thread ,, the one with like 100+ pages... someone else laid it down too, and they had no bowing at all.
I laid mine down.. and the in store display had the EXACT same problem And it wasn't laid down. My dad works at a walmart,, and sometimes they lay them down (the rear projection tvs) and sometimes they are even delivered on their sides. Of course the consumer will never know.
They just receive and unload.
But.. here's more info.. The owners manual does state under PLACEMENT: "Place the TV in a vertical position only." It goes on,, well ventilated area.. etc. So I took that to mean when your watching TV, keep it only upright.
In another section, CABINET it states : If you place the TV set face down, it might cause a problem because of dirt, or some other contaminant may become attached to the inside of the TV set.
With that,, I deduced that I may lay it down, if I wish, but only if it's not plugged in , like moving it around.
I also called and spoke with a Samsung rep,, she said that its best to keep it always upright and not move it around often. That when not upright,, it might move the tiny mirrors in the display device.
Oh and one more thing,, the unhelpful CC Store manager had told me it's not good for the bulb if i lay down the tv,,, i replied, It's not a bulb its an L.E.D. (the decal was still on the model even)