Raytracing didn't show soft shadow in reflections, nor did it do any derivative even. Added a basic version for it in raytracer now, still needs improvement on heavily curved surfaces. But it's better! Examples: Glass sphere, mirror cube and sphere, look how it ignores bump and shadow http://www.blender.org/bf/derivative256.png in svn now: http://www.blender.org/bf/derivative-svn.png