Played a little more with it.  If I pop into the Setup room and back out without changing anything it wipes out on of the texture groups (along with it's UVMap) but it does allow me to save the figure to the library afterwards.

Anyone know a quick way of restoring the UVMap information for a given texture group?  I could drag the obj into UVmapper but I was wondering if there's a way to do it within Poser.