Simon Fell > Its just code > Document bundles bungled ?
OSX has something called document bundles, these work like regular application bundles (i.e. Finder shows a single Item, but really its a directory), but for documents instead. Pages & Keynote both seem to use them. If they never leave your Mac, then they seem fine, but otherwise, the fact that they're not really a single file doesn't seem to get hidden that well, try attaching one to an email in GMail, or uploading one as a document in Salesforce, its a most unsatisfactory experience, I though at least Safari would at manage it, but no, that didn't help either.