I was in a Hitchcock mood the other night , and I pulled out my DVD of Vertigo to re-watch . This was the very first DVD I ever bought, back in 1998. Well to my surprise, when I put the disc in my Sony player, all I kept getting was message saying that "The Disc is Dirty". Of course, I proceeded to clean it , but still got that same message every time I put it in . Then I tried my Psycho DVD, which I bought at the same time as the Vertigo disc, and kept getting the same message. These DVDs simply wouldn't play . My current player is a Sony that I bought in 2001. These discs played fine in my previous Sony player. I was wondering if there was some reason why the newer player wouldn't play these older discs, or perhaps that the discs somehow went "Bad" (even thogh they've been kept in optimum conditions). Has anybody else had issues like this ?