Oh really? I'll check that out too. Having the same problems with all blonde hairs and Iray, no matter what kind of light, no matter what kind of hair (yes, iray shaders in use). Basically I'm fixing those things with Photoshop after rendering right now. But I'm having problems with Iray in general. Some scenes have been ended up OK, after several hours of clicking random stuff.. In a scala from 1 to 10 where 1 is easy and 10 is hard, I would give Iray a 15. To compare, Hollywood Standard render engine (Arnold) would be around 3