For modal (and modeless) windows, pop-ups, and "lightbox" ajaxed pop-ups,
after a person has performed certain tasks, there are two options - commit
those changes or cancel the dialog window. What order is best? Mac OS X
orders them as Cancel | Save, whereas many windows and web applications
have them as Save | Cancel.
Is there published research on this out there? What are your heuristics?
Why? How has that worked for you?