The hair cache file problem was in P5 as well. When I found it, all of the P5 hair at RDNA was updated to reflect that. In general, any dynamic hair file needs to have the lines removed.

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)