I am getting a faint and high pitched whine when I scroll with two fingers on the trackpad, and tap with one finger. Anyone know what this is? I have an August 2009 MBP17 with 3.06, 8GB RAM (Aftermarket), INtel X25M 80Gb in the main slot, 500Gb Seagate in the optibay. It's not the mods as I have had them for over a year without any problem. Just found the sound today.