I have 3 lamps on the scene (the one on the left has 0 energy):
The rendered surfaces are supposed to look like shiny metal. However, there's always a dark spot at the top of the large light orange surface, apparently no matter how the scene is lit:
I've also tried flipping normals, removing doubles in the mesh, changing specular and diffuse, horizon color, and turning off receiving shadows. Has anyone seen something similar?