It appears to run fine at first, but after a while the screen looks like this:
http://www.madmartian.com/special/candlelightprob.jpg
A little color on the edges and the iconbar shows up if I hunt around, but the rest of the screen remains black no matter what I do. Only a reboot will return it to normal (until it happens again). Any ideas? I turned off Smart Backlight but that didn't make a difference.