I think I had exactly the same problem. This thread solved it for me:

http://www.cornucopia3d.com/forum/viewtopic.php?t=5265

I changed to world coordinates and it solved it. However, if in your case it doesn't, you can still use the excellent materials that Dave provides.
Note: if you're changing mapping modes (from parametric to world or whatever), and if your material is a mixed material, you have to do it in the individual materials, not in the mixed result.