ActionScript 3.0 :: FileReference.save() Causing Crash?

I'm currently using the FileReference class to allow users of my program to save and load files from their PC. I'm currently trying to get the save function to work (I'll do load later) and it all seems to be working perfectly but while testing it (locally) it crashes Flash Player every time it saves.
 
The code is pretty simple just now (this is contained in an event handler which triggers when the save button is pressed):

var levelData:String = GetLevelData();var outputFileName:String = "NewLevel.txt";
saveFile = new FileReference();
saveFile.addEventListener(Event.COMPLETE, SaveCompleteHandler);
saveFile.addEventListener(IOErrorEvent.IO_ERROR, SaveIOErrorHandler);
saveFile.save(levelData, outputFileName);

And it all works fine - the NewLevel.txt file appears where I want it to and contains the correct data. But as soon as this has completed Flash Player quits and I get the 'Flash Player Quit Unexpectadly' message. There are no errors in the output from my code. The SaveCompleteHandler function has been called and the SaveIOErrorHandler function has not.

Could this be a bug in Flash player? I'm using a Mac and have encountered a few bugs with the Mac version so I wouldn't be surprised if this was another one.