Yah. The problem lies right in the "U" and "V." A mesh contains vertices at cartesian coordinates X, Y, and Z. Additionally, the file format contains information on which vertices are connected by lines, and which resulting polygons are filled (the .obj format can also contain information on surface normals, but Poser ignores this, preferring to make up its own). Parallel yet independent to these cartesian coordinates in three dimensions, each vertex may also have coordinates in an additional 2 dimensions; the coordinates of U and V. (Or is it a coordinate of the center of each polygon? I forget!) Technically, every polygon on a UVmap could be detached from the others and moved to some random part of the map. Nothing requires it adhere in any way to the original shape of the mesh.