Recently, when I click 'sleep' or hold play on my Apple Remote, my Macbook has been going into the deep sleep mode instead of just 'sleeping'. Is there any reason for this, or any way to disable it? I use it closed with a VGA video adapter to my external display, not sure if this has anything to do with it. I think it's been happening since I installed a wireless Mighty Mouse, which I bought because my old USB Microsoft IntelliMouse kept waking up my Macbook after I'd put it to sleep... I just can't catch a break!