Thanks everyone. The .obj in question was actually a figure, not a prop. Deleting the old .rsr did the trick. I should have tried that before posting here.. feel like a real fool now. Because this worked I have another question.. What IS in the .rsr file and what is it for? The fact that Poser needs them and creates them if they are missing suggests it is some kind of compiled shortcut. Looking at the contents, even with a hex editor, doesn't reveal much. It's interesting that they are all about the same size. The only exception I have found is the main POSER.RSR file. If you delete that one... oops poser cannot rebuild it.