I have my early 08 Macbook connected to a Dell display. I have checked, "Allow bluetooth devices to wake this computer." This way, all I have to do is touch the Mighty Mouse and the MB wakes up. Lately, I will select "Sleep", and continue doing something else. In a few minutes, the Macbook will wake up on it's own. I wake up in the mornings and it will be running. What causes it to start up again like that? It is really annoying.