hi all. got a umb 2008 2.4 4gb 500gb 10.6.2. just dl the firmware update for the no cd sound fix or whatever they want to call it.. problem now playing music in itunes or listening to audio from anything and speakers are cracking... just worked great 10 min ago... though it was soundflower... uninstall.. nope not it. suggestions besides mac genius visit? thanks so much