I've got a new mac pro which I love apart from one thing... Sometimes when I put it to sleep and go away for a while, I come back and press the space bar to wake it up and it starts up...not wakes up...but starts up. Its weird, because it's seems to have not fully shut down because pressing the space bar does not normally start a computer that is off, but that is what is happening here. I am sure that this only started happening a couple of weeks ago or so after an update (don't know which one unfortunately). Can anyone help? Dual 2.8, 10.5.2, 10GB Ram, 8800GT.