After some messing around, I've come to the preliminary conclusion that once the box is checked that new files created won't have an extension. That doesn't change any of the old files though, imported from other computers. It's a process, I guess, for someone that doesn't like file extensions. I'll deal with it. I even tried using an Automator workflow for it. No dice. At least your system doesn't have them.
1/29/11 at 4:59pm