Well, this is the first time P7 (even the no-SR-right out of the box P7) actually crashes on me. I had V4.1 on scene, did a render, and when I hit the tab to go back to the Preview window, the desktop greeted me. It hasn't happened to me again, but then again, I haven't used V4 again either. The more I play with V4, the more I find myself going back to A3...