I don't really know how to describe it other than to say that when I open up a window that I have centered in the screen, and I drag it around the screen, I can a "ghost" of the window running all the way to the left and right edges of the screen. The areas of highest contrast in the window are most visible. It is not a clone of the image, just a very obvious "shadow" of it. I cannot see it running from top to bottom, just left to right, regardless of which window or software I have open. Is this a common thing?