Hi - I have the 2nd version MacBook and am having some issues. I think my computer is waking itself from sleep sometimes because when I wake it later, the battery % has dropped significantly, which it usually doesn't do when it sleeps. Also, I was sitting next to it once while it was sleeping and I saw/heard it wake up for a little while. Another problem -- which may or not be related, I have no idea -- is that my Bluetooth card sometimes doesn't seem to be available. The icon on the top of the screen sometimes has that line through it showing me that it isn't available when it's an internal card. Any advice? Could this be related?