I have the Vertigo Collector's Edition DVD released by Universal some years back. I've watched it before and never had any trouble. The disc is in pristine condition. Not a scratch or smudge on it. Suddenly, i pop it in this morning into my Denon 910 and get a disc error message. I tried it again, same thing. I tried it on a JVC and an RCA player and my pc. All had the same results. What could have happened to suddenly make the disc unplayable?