I appreciate this feature in the sense that it's a bit safer, but on the other hand, I wouldn't have lost nearly as much work due to the crashing bug if I were able to keep with the typical habit of saving every minute or so, which this safety feature prevents. Maybe there's a best-of-both worlds where it can rename the current file to " (copy 2)" or whatever and then save with the original filename whenever you hit Alt+S? That would make this much more useful, and even safer, for marking up PDFs.
hrev45525 gcc4hybrid.