Yes it does. Did you know that, if you texture something and duplicate your single textured polygon, copy this in random amounts (in whole or in part), the file size of a model can grow to 10 MB, without a texture, one frame of animation, and only a few hundred polygons and vertices? I found this bug in 6.31.4 and it hasn't been fixed, despite reporting it. It's not readily apparent in 6.40.5. Unattached skin vertices don't always get deleted in full. They stay in the same spot and you otherwise couldn't tell if there were any because they occupy the exact same spot of another vertex.