IOErrorEvent refusing to catch

This just isn’t firing, I’m still getting your standard Error #2044: Unhandled IOErrorEvent:. text=Error #2035: URL Not Found.

loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadCompleted);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loadError);
loader.load(new URLRequest(url));

private function loadError(event:IOErrorEvent):void
{
	trace("Load error: " + event);
}

… the COMPLETE event is catching just fine. I’ve done this a million times and this time it just isn’t working, I feel crazy. :stare: