I have run into a problem when I try to close a scene in PP2010.  When I close & save the scene PP2010 refuses to close!  If I persist in closing, I completely loose the scene!  My pz file has 0 KB!

I saved periodically as I was building the scene without incident.  The scene was not overly large - 6 figs, clothes and a some props.  I have 6 gig ram and a core i7 processor.

This has happened twice in a row & wasted a lot of work.

Any ideas what could be causing this?

Thanks