My concern with this color bleed has been in regards to creating a character/skin texture set potentially for the marketplace.

 

There's your answer. You need to keep it in a pristine studio eviroment. A white room with direct Poser light or emitters. No envsphere unless its a desaturated fill light.

Like a photographer. I think kobaltkween is working on such an enviroment. Oh and sIBLs might give you more predictable results .