Yeah, sometimes I can spoof it into saving while it's hung, still trying to cancel. But it's hit or miss. I don't always think about saving before every render, becuae the majority of the time I don't have a problem. It's when it decides to hang when I've made no changes other than a camera angle or figure pose that really gets me. Would be even worse if you have to reboot before every render. They definitely need more error checking in the app.