I have 10.8.3 on mbp mid-2010. I've had problems with the logic board and got a new one installed by apple due to one of their programs. My macbook pro sometimes doesn't wake up from sleep. I got a blackscreen. I've read about this matter and it seems common on 10.8.3. But I've got my mbp energy settings never go to sleep, but still I get these blachscreen. My macbok pro is connected to a external display and running in closed clamshellmode.