I'm running Safari 7.0.2 and under the passwords Preference Panel there is no longer a check box that says "Allow AutoFill even for websites that request passwords not be saved." Is any one else seeing this? If so this is a big feature regression. I also notice that Safari in iOS 7.1 doesn't offer to save all websites either.
I think it's on by default now. You can test it here: (3rd form - Autocomplete=off)
http://enhanceie.com/test/password/passwordautocomplete.asp