[Andrew]

Jakers, I don't think there's any difference between our behavior and the corresponding functionality in TextEdit and iWorks: new documents have a "Save..." menu item, and once they've been saved that changes to "Save a Version". This is the behavior provided by the system frameworks in OS X. (I realize that's not going to make you like the behavior any more, I just wanted to point out that we do in fact behave the way that Apple's apps do.)