My rules? Hahaha, right...
What!? That's not what I said at all. I said nothing about number changes, I said point releases
1.0 -> 1.1 is what is considered a point release in the software world
1.1 -> 2.0 is what is considered a major release
Windows 95 -> 98 would be a major release
OS 9 -> OS X would be a major release
Anything less is, well, not a major release regardless of how Apple spins it. I don't know why this is something offensive to all of you, it wasn't an insult. I only brought it up to him because you have less to worry about when it comes to compatibility when you're dealing with point releases, because core components are less likely to change. Just look at what moving from XP to Vista broke, or OS 9 to X