I dont think so. most people i know, who have this problem, have this from the day they bought it... at that point there wasnt even an overclock option yet. Second of all the screen has an iron plated back panel and space between, the CPU and chips are on the bottom part of the phone (behind the keyboard) so would be very strange if that was the problem.

I think its an error in the production process. witch the back layer ist fully atached to the screen and gives some kind of bubbles between, wich gives a strange white spot when backlight shines at it.

Mine had 2 spots and 5 dead pixels in a row. I think mine was built on a monday morning.