I have a similar problem I think. I have a scene which is only half rendered, each time I try to resume it the program crashes. I can only think this has something to do with my memory as I only have 1 gig. It does seem strange though that it got halfway but now no longer wants to render. Maybe something has got corrupted like yours. I am using Vue 6 Esprit. If this continues I may have to redo the project, sigh!
I hope someone can help you.