Try putting the hair in a seperate render layer and see if that helps, you'll have to render two seperate passes but maybe that will clear it up, just have to composite it back when you are done.
Red bellows of flame have blackened my stones
Convulsing my frame and cracking my bones
Hell's dragons of steel who roar in their chains
Crawl into my caves to suck out my veins.....
-The Mountain P.F.M.