nautilus and gtk do use the filename to list directories because opening and reading content for every single file in the directory you browse is quite ressource expensive compared to using the filename, the detection uses the content when selecting though which is when you need to confirm the mimetype to use the correct software
-- Nautilus uses magic numbers but not Gnome file chooser dialogs https://bugs.launchpad.net/bugs/556354 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gtk+2.0 in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
