I'll take a stab at it. Sometimes Poser exports "extra" body components that aren't visible in Poser. For example you may get an extra abdomen area. So not only do you get nasty bits sticking out here and there but the texture doesn't map properly. My first suggestion would be to look at your list of meshes and see if you have some dupes. Ctrl-clicking (on a Mac) in the area will produce a pop-up window of all the pieces under your cursor. Select them one at a time and see if the offending object is one of them. Hide it and rerender to see if you got the right one.