I'm proud to be an owner of macbook SR 2.2. Everything is great. I love the design, performance, keyboard not to mention OSX. But the problem is the buzz noise from left side of the keyboard. It sounds like an old bulb making a fly/bee noise. I know this has been addressed, but I'm wondering if anyone actually exchanged and got a replacement unit without any noise. This really bugs me when I'm in a quite environment, but if this is just typical behavior of SR macbook or no one had any success on getting a better one. I certainly do not want to send this back if I don't get a better one or worst yet getting a louder one. I did a search, but it seems that some people just live with it, and others claim they don't have any issue. Or maybe some people don't even notice. If anyone got a replacement unit without any buzz, please let me know.