I just added a popup dialog to UVMapper (win, mac to come) so that if you have an active selection and try to save out the model, it asks if you want to update the selection first. If you say yes, the selection is updated and you get to save the model. If you say no, you don't get to save the model. This should eliminate any confusion. Took 5 minutes, sorry I didn't think of it sooner. Cheers, Steve