The mesh seems to be doubled up on itself somehow in the thigh areas, but not in the hip (see screenshot from Anim8or). This is probably confusing Poser's preview, and I don't blame it, it's confusing me too... Whether it needs to be fixed is up to you, since you say it works ok; but I know it would bug the hell out of me. :) How does it render? The facet structure looks as if it might be prone to causing artifacts, but I haven't tried it.