>Interesting. I've confirmed that behaviour here. > >I assume this is because the dialog is filtering on *.adf and so thinks >anything ending in .adf is a file. > >Cheers, >Rich It could be a bundle extension was inadvertently set. The thing is you're not using NSApplication but calling certain Cocoa methods directly which are usually called indirectly. You have to know how to call them unlike most Cocoa developers. Most developers merely have to define the files in a property list and everything else is done for them. I should probably peek at the source instead of speculating... :)