On Mar 1, 2010, at 9:06 PM, Graham Cox wrote:

> [[NSFileManager defaultManager] setAttributes:[[self class] 
> defaultFileAttributes] ofItemAtPath:[self path] error:&error];
> 
> Where the default attributes are:
> 
> + (NSDictionary*)     defaultFileAttributes
> {
>       return [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber 
> numberWithBool:YES], NSFileExtensionHidden, nil];
> }
> 
> But the extension is not hidden. Opening Get Info in the Finder, the "hide 
> extension" checkbox is greyed out, though is is checked, as if the extension 
> were hidden.
> 
> Any idea what's going on there?

No, but you might try LSSetExtensionHiddenForURL(), instead.

Cheers,
Ken

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