The more I use my rMBP the more I see "issues". I get letters disappearing when I type, only to reappear as I type more. I get patches that drop out but come back when I refresh the screen. I get images that "linger" when the screen is scrolled. See the attached image. The half ballon will float up and down as I scroll the screen. Is this just me or is this a video card driver issue that is already known?