I have an OBJ, with UV Mapping that I import, and all is fine.  I can see all the textures, etc.  I seem to be able to load Light presets from my library without affecting the OBJ preview...but the moment I Delete a light (any light), the entire OBJ goes black in preview?  (This is P9 on Win7 64 bit)

Render is still fine, but its a big OBJ, and I cant really see it to get the pose, and the rest of the scene right?

Anyone run into this or have any ideas?  Only thing I could find on a search was to look for the Normals Forward on the materials, but those are all unchecked.

All materials basically just have a single image map node plugged into Diffuse and Specular, with close to white, and value of 1