Good question, gjlazar. What is the danger in the various ways of quiting a Windows VM, especially a bootcamped Vista VM? Back when I was a Windows user (yesterday), I was a heavy user of Hibernation. Now I know things are different in Parallels, but how different? Let's say I'm running a bootcamp Vista VM session and I have to packup my stuff and move: what is the proper thing to do with Parallels if I want to put my Mac to sleep? Before, I would have just hibernated Windows.