Yesterday night, I put my new Alu MB to sleep, and it goes to sleep it straight away switches on! I tried many times and the same thing happened, even if I left the laptop open and put it to sleep through the menu. I wanted to leave it on as I had tabs open on Safari, but I ended up shutting it down after many attempts! Any idea why this happened? I tried with my external monitor out, with and without power, no USB etc Also, when it does go to sleep (usually), sometimes it doesn't wake up! Any idea? Should I get it replaced? I don't want to be without it really as I need it for work.