I have had this problem for a little time now, but have not taken the time to post on the forum yet.
When I am making scenes and materials, it seams like the diffuse and maybe the exponent texture get's ignored, bump seams to work.
I have tried with both tga and jpeg same problem.
Material settings: A phong with IOR of 2 and 100 in glossiness.
Here is an example.
Diffuse(Made it green to show it better, since it was dark to begin with)
Tiles_Dark_Diffuse.jpg [ 317.48 KiB | Viewed 1827 times ]
Tiles_Dark_Exponent.jpg [ 360.58 KiB | Viewed 1827 times ]
Tiles_Dark_Bump.jpg [ 316.77 KiB | Viewed 1827 times ]
Here is how it looks in Indigo, you can even see that the opengl preview shows the green diffuse.
Inge_Texture_Problem.jpg [ 198.58 KiB | Viewed 1827 times ]