Comment 3 for bug 1273102

I still think the save button is necessary for the user to validate what they've just entered.
The android evernote client uses it. So there's just one control on the header which is save, and if users want to exit without saving they just have to press the hard back button.
Since we don't have hard back button, I'd say we need to place both save and back on the header.

However I agree that the first time you create a note and hit back, you should have a "draft" note created, so I think the untitled note makes sense.