I just got a new MBA running OS X 10.8.2, re-installed from scratch Fusion 5.0.2. Now, almost every time I sleep the Air by closing the lid, with Fusion still running (not suspended), OS X crashes. At least, when I re-open the lid I'm back at the initial boot login screen. My virtual machine must be restarted. I have not yet seen a crash when sleeping the computer without Fusion running, and I will soon check for crashes when the VM is suspended.
My guest is Ubuntu 13.04, but that's run just fine on my older MBP with 10.6.8.
Has anybody seen anything similar? Is this a known problem?