That's different, the re-release has new content which wasn't in the original that you bought? And the original continues to work? Instead imagine that half th

That's different, the re-release has new content which wasn't in the original that you bought? And the original continues to work? Instead imagine that half the disc you originally bought turned out to be self-destructing ( http://news.bbc.co.uk/1/hi/magazine/3064327.stm http://news.bbc.co.uk/1/hi/magazine/3064327.stm ) but you can buy a re-release without the issue for a discount if you trade in the old disc.