brenthomer, I'm running a dual P4 1800, Win2000 sp2 1.5gig RAM with nVidia card. So far I haven't seen anything that has prevented me from saving a file. "Knock on wood I don't" but, I have had funky memory problems. Usually the problem would effect the whole program. Removing shaders or curser mismatch. The work-around I use is to save often or even reboot Carrara giving back the memory. Hope this will help --Ashley3D