I have the same issue. I am using the 64bit version on a newly built system. All current components. Once the system goes to Sleep the video will not wake up. I see HD activity when I move my mouse but the video does not pick up.
Interesting... mine is already set that way. When the mouse move doesn't get the video going I use the power button. Still no luck.
Arghhhhhh.... Currently have sleep disabled so as to not have to do hard reboot to come out of sleep mode.