Hi Littlefox - It sounds like Deep UV is changing the number of vertices for some reason (perhaps because the model is grouped?) Hard to imagine why it needs to do that. Have you had any luck finding a work around? If not, let me know and I'll see if there's anything I can do to help. Coming soon - UVMapper Pro 3.0 with it's own relax vertices feature (hopefully this will no longer be a problem =) Steve