There's another workaround to this, if you're up to play with a text editor and the pz2-files for the hair colors.

Open up the desired pz2-file in notepad etc, and check the line that comes right underneath the version number.
It should look like this:

{

**version
 {
 number 5
 }
actor figureHair

**The "actor" is the part that prevents loading a texture. If you replace it with "prop" and save the pz2-file under another name, it loads and works fine.

I'm having this issue with a few hairs, as well as some I do know worked before a Carrara6something update, but ever since Carrara seems to ignore that  prop-command me thinks.

BA