Hi. Just got the Macbook in my sig. According to the serial number, it's a week 39 build. Fantastic machine. Unfortunately, I noticed the ol' processor whine (which I thought was weird since it's not an MBP) the other night. It seemed to only be an issue when it was plugged into the power adapter. I decided that it wasn't enough to bother me, but tonight it was extra loud and kind of driving me nuts. Well, I put it to sleep, crawled into bed, remembered something else I wanted to look up online, woke the Macbook back up, and the whine is completely gone. I didn't change anything else. No other apps are running. Is this always going to be an intermittent issue? Why would it sometimes be there and sometimes not when the conditions are the same?