You have the same number of facets and textures, yet a different number of vertices. If some vertices have been moved somehow, that would make them not weld when they should. If morphs work, and yet there are a different number of vertices, it can only be a welding problem. In other words, there are now two vertices very close together where before there was only one. Morph targets treat the vertices on the boundaries of groups as belonging to the group that's being morphed. In other words, in a welded mesh, some vertices are used twice because they belong to two groups. If those boundary vertices become unwelded, the morph will still work because the group will have the same numebr of vertices; however, the entire model will not. However, UVS work differently, so that might explain why morphs work but UVS don't. I hope that makes sense. If you can weld the mesh with a tolerance applied, rather than with UVMapper (which requires exact equivalence), you should end up with 17605 vertices in your new mesh again. They tell me that Poser's grouping tool can do that, but I've never tried it myself.