Oh wait - Questlove beat me to that title.
Well, since Chris has taken a turn down Meta street, I'll go for a spin in that 'hood.
When is a text final? What exactly are revisions, updated editions, remixes, director's cuts - the same book/movie/song or a different thing altogether? Does one depend on the other? Is Rohmer revising, rewriting or re-thinking Separation or just using it as a basis to write a "new" book really, really fast?
I will have to finish Separation Two to think about this some more - or maybe I have already finished it?
But does a writer, as the creator and owner of a text, have a right to rethink it, to change it? It's his/her book - why can't they say "Oh wait - I wish Hermione had ended up with Harry" and rewrite it to make that so. Is that a betrayal of whatever the audience had invested in the story? Do audiences have rights?
Perhaps going into these areas of literary theory to consider what Rohmer was up to is a pointless exercise. In fact, I know it is. But what else can you make of a book with a different title, being sold as such, is in fact mostly the same book all over again, with additions. (see Brian's handy guide a couple of posts back).
I don't think this would matter to me so much if it was simply a revised edition; something about giving it a different title and then doing so little to make it different I find annoying.
PS: The simple answer is "Greedo did not shoot first because I say he didn't. My experience taught me that and I will not change that self-evident fact just because some guy at ILM proved to George it could be that way if he wanted it to".