I have a 1.6 Air, and I usually put it to sleep rather than turning it off. Unfortunately, following a sleep (either initiated by me, or automatically) it freezes with the color wheel. Oddly, I am able to use a hot corner to activate expose, but I am unable to open the force close dialog, any menus, etc. It will just be stuck at the color wheel until I do a hard restart. I've found this is more likely to occur when it has slept for a longer time. For example, if it's asleep for 10 or 20 minutes this is unlikely to happen, but if the sleep time is greater than a few hours, this problem arises more frequently. Any help would be appreciated!