That darn division by negative one! Get's em every time. 

Don't get me started on booleans and terrains  and animating materials while you are at it. There is a lot of busted stuff in B6. Now I'm getting a migrane. 

You are talking about material definitions not image maps right? Sorry for the confusion. I was thinking you ment textures like you slap on a Vicki. You are talking about actually setting the object color in the mat file. I think this is something DAZ will have to fix.