How do you configure Leopard so it automatically hides all file extensions? I've gone to Finder/Preference/Advanced and unchecked the 'show all file extensions' option, but it does nothing. To remove the file extensions, I literally have to go into each individual file. There has to be some way around this, but I'm new to OS X and thus a complete noob. As far as I can tell, extensions are showing for most (if not all) file types (e.g. avi, pdf, rtf, doc, docx, etc.). I tried searching for an answer, but with no luck. Any help is greatly appreciated!