Weird spots in IRAY renders

I am noticing spots on clothes that look like bleach spots on shirts when they render that are not prsent in the shaded view. Also seem to get these in some of the hair renders as well. It really looks liek when chemicals are spilt on 35 mm film. Is there a setting or something I am doing wrong to remove these?
Comments
Does your figure by any chance have any geometry shells on it? Tanlines, wet skin, etc. If so, you should have anything smoothed conform to the shell. You could also experiment with reducing the offset on the geometry shell and/or adding a push modifier to the clothing and dialing it way down to 0.05.