the first screen shot below is a particular texture set (Kirei for A3) loaded in Poser 6. The second is the same texture set in Poser 7. Its not the textures specificly but the nodes that shade the textures. A few other character texture sets that use some kind of real skin shader tree also have this problem.

The circled section shows the values that can be changed to get the texture hue close to what it should look like. The "red" value can be changed from .3 to .1 OR I can change the color mode from RGB to HSL, however in the screen shots you can see that the values are the same and yet in the two programs it colors the skin textures differently.

Im not sure if this node is where the EXACT problem is occuring but Im pretty sure real skin shaders and similar skin shaders are where the problem lies.