Okay, so I am using Mac OS X 10.6.4 on my MBP. I use the bottom-left hot-corner to put it to sleep. I leave it open with the charger plugged in. Yes, I understand that's not the best idea, but it is actually charging, not just sitting there cycling through the top 4% of the battery constantly. Anyway, I use Alarm Clock 2 to wake myself up. Even though I put the laptop asleep, it wakes up. I lock the screen because it forces me to get out of my bed to enter my password to turn off the alarm. Well, I have been doing this for about a month or so. Twice, I have slept in and missed work because my MBP won't wake up. Blank screen. No keyboard or mouse response. I know it's on, because the power indicator on the front is lit up. The only thing I can do at this point is hold the power button down to force it off and then turn it back on. Does anybody know why this is happening and/or why it isn't consistent?