The last computer in the house to have SL installed and I have a problem! This is a 20" White iMac C2D 2.16. The problem is that I installed SL and the 10.6.2 update (though I did do it through software update) today and since then I have not been able to wake the display from sleep. Actually, the display does not enter screen saver mode. Instead it hangs on a black screen that I can't get out of. I have to do a hard restart in order to get back in! I have done an SMC reset, I've reset PRAM, and I've fixed permissions all to no avail. Help!