MY PSR-800 is about 2 months old. I am noticing a small area of total blackness at the very bottom of the display. It almost looks like a piece of fabric between the black faceplate and the underlying part of the radio has slipped up into the display area. It is very slightly curved and is starting to impinge on the bottom row of text. It appears to be growing. Does any know if it is fabric? Or is the display starting to fail, and is the "blackness" dark pixels?