Because of this "function" of Poser, I have taken to creating a 'temp' folder in every library. I save each prop, pose, character, ect, including making MAT poses, before I save the PZ3. Than I just update the actual changes made and resave the libraries. I usually have about 3 copies of any given instance for each project I do. Paranoid?...nope. As the saying goes, "Just because I'm paranoid, doesn't mean that everybody isn't out to get me." ~EA