[scrabble]

My understanding is that Raymond Chen ( http://blogs.msdn.com/b/oldnewthing/ ) was a huge part of ensuring that everything was backwards compatible. If you like that kind of thing, he's got a book: http://www.amazon.com/The-Old-New-Thing-Development/dp/03214...

[martinnormark]

Amazing. Thanks, I didn't know of him specifically but I do remember seeing his book somewhere.