Ah, I thought you were talking about something more like this:

It looks like a normals problem or some weird doubled mesh poking through.

Remove the normals by saving it without them.  It will also shrink-down the file size considerably (30% sometimes) Poser doesn't use normals. 
*You can use UVMapper to scrub the normals from an object if the app you're using won't do it.  Just open and save it without checking the "Export Normals" box.