Hello, I've had my MB for about a week and a half.. and I've been noticing this very faint sound if my head happens to be close to the keyboard... and it's only on the left side of the keyboard. It kind of sounds like..... a little electric fly is hanging around inside my computer.. I've seen all of the "electric buzz!" threads. But I wouldn't call it a buzzing sound. In another thread, someone said to put your ear up against the charging block and that buzzing sound is the same sound. The sound that I hear is completely different. The sound is very "digital" sounding... it sounds like a quiet and very high pitched tricorder sound from star trek! hah. If I take a video in photobooth.... I can hear the sound - but it sounds reallllly loud in the video.. not nearly as loud as it actually is. It doesn't bother me at all... as my computer is not generally within 6 inches of my face. I just want to make sure it's not a "something's broken!" sound. Thanks!