Last night before I went to sleep my macbook pro unibody 2010 was at about 60% battery, so I closed my lid to go to put it asleep, left it on the coffee table, and went to sleep myself. Woke up this morning to a completely drained battery, and once I plugged it in the mac had to boot up fresh... not from hibernation. Now this is the first time this has happened, but I did make a change a week ago by cloning my drive and installing a Momentus XT 500GB. It came with sd23 firmware, and I read about many of the problems associated with it, so I almost immediately flashed it to sd24. I haven't had any problems with the drive so far, but don't know if this is a problem with the new drive, or if this may be a program, or some other anomaly. One troubleshooting check I just did was shut the lid to listen if the drive spun down, and it did. I have searched extensively through the forums, although I could have missed something. Help?