I remember reading about this issue on the first gen Surface Pro, but I believe history may be repeating itself with the Surface Pro 3. I had my unit for 2 weeks when I began to notice it, in particular when web browsing with white backgrounds. So, I exchanged my unit and now believe even my new unit may have the beginnings of the same issue - only a few days into using it. It is a very faint hazy yellow vertical line, maybe a quarter of an inch wide along the left side of the screen. Makes me wonder if there is a component behind the screen which is heating up causing it. (I've seen that before on Lenovo tablets) Anyone else experiencing the same?