VK...it doesn't matter WHY Poser does it. It matters only that it does it. All I know is that in Bryce etc I can rotate something on either x, y, or z with NO gimbal lock. It doesn't matter what the technical reason is, Poser does not HAVE to exhibit the behavior when rotating the body. They just didn't code for it. It makes Poser extremely difficult to use for scene setup and is why I think adding a fancy raytracer to Poser 5 was silly without fixing this problem.