Little spot in bottom left corner 2nd time!!????

[riddler1979]

There is a small light spot about .5 inc up and in from the bottom left corner. This is my second brand new 6800 and it is the same exact spot and problem. It wasnt there the day I got it, but showed up within a week. I took the first one back and they gave me a new one which I have now had for 10 days. Does anyone know if there is a screw or something behind that spot that would cause that? Has anyone else even noticed tis? I can only see it on lighter or white screens, not on the darks.