I've run into this before....not sure what causes it ;). The normals are all facing out? I'm s ure they are....ya know what ur doing...lol.

This normally happens for me when I model something gargantuan and then have to scale tiny in Poser (less than 1% of original size). At least, I think that's the problem I was having. I haven't come across it a lot :)

Edit: I've edited this more than once to clarify my thoughts. Sometimes even I don't know what I'm talking about. LOL

Laurie