I tell you I would hate this program if it didn’t have the auto save feature because I keep crashing. It always happens if Full Screen mode when I switch to other applications, like a browser or Mail. It doesn’t do it every time, but it does it enough now that I usually break out of full screen mode to switch. If I don’t there’s about a 1 in 3 chance that I’ll get the beach ball and then splat, “please tell apple how things went wrong.”
Anyone else seeing this? 
I’m running system 10.6.2 on a 2.26 GHz Intel Core 2 Duo 13 inch MacBook Pro with Scrivener 1.53.