In Mountain Lion, you don't need to accidentally save changes to original.. it automatically does when you hit Save As (which shows up when holding the Option k

In Mountain Lion, you don't need to accidentally save changes to original.. it automatically does when you hit Save As (which shows up when holding the Option key). And that is where this becomes bloody annoying. It means every time I do a Save As, I have to revert the "original" file to its "original version". That's idiotic.