I guess you don't have separately mapped textures for say, the feet? That is, is this one entire texture, or split into groups like Posette? If it's all split up, you should be able to alter the bump production for the areas you want, but if not... you might just want to make your own, new bump map... How's it all look rendered in Poser? And of course, it could have something to do with the difference in versions, possibly the .obj export.... I'm really not sure. :(