From reading the docs the hairs actual colouration comes from a separate 'tint' texture, is that right, in this case that's making the hair gold/blond, right?.
So where is the 'green' coming from? Is there, or are you standing in front of the green lightsource? Or have you got a green texture being used as part of the hair unit somewhere? If your character moves around in a scene, do those green spots move with the mesh or do they stay put?