Hmm...I don't think that my DVDs are screwed up. I bought mine second hand from Amazon.com (saved me a pretty penny), so I don't think that I got a screwed up version.
But this is pretty screwed up though:
As far as I know, this isn't true. One - Robert Z. and Producer Bob said that "Sorry folks, there's no part 4." And 2 - the Delorian was destroyed. Of course Hollywood can usually do whatever the hell they want. It's just that none of the original cast or crew is gonna do it. And poor Michael J. Fox and his Parkinsons Disease would make it very hard to do a forth movie.
So would I go see it? Doubtful.