FILEREFERENCE BUG IN FLASH PLAYER 9 FOR MAC OS

package
{
    import flash.events.*;
    import flash.net.FileReference;
    import flash.net.URLRequest;
    import flash.net.URLVariables;
    
    public class UploadTest
    {
        var fileRef:FileReference;
        
        function UploadTest()
        {
            init();
        }
        
        private function init():void
        {
            fileRef = new FileReference();
 
            fileRef.addEventListener("select", onSelect);
            fileRef.addEventListener("complete", onComplete);
            fileRef.addEventListener("uploadCompleteData", onUploadCompleteData);
            
            try
            {
                fileRef.browse();
            }
            catch (error:Error)
            {
                trace("Unable to browse for files.");
            }
        }
        
        private function onSelect(event:Event):void
        {
            var request:URLRequest = new URLRequest("path/to/upload.php");
            
            try
            {
                fileRef.upload(request);
            }
            catch (error:Error)
            {
                trace("Unable to upload file.");
            }
        }
                
        private function onComplete(event:Event):void
        {
            var file:FileReference = FileReference(event.target);
            
            trace("completeHandler: " + file.name + "\n");
        }
        
        private function onUploadCompleteData(event:DataEvent):void
        {
            var vars:URLVariables = new URLVariables(event.data);
        
            trace(vars.sessionID); // prints the variable value
        }
    }
}