I have reported this. It seems to me to indicate very weak beta testing; the very first use of this important feature revealed how flaky it was. The Vue-Poser link is supposed to be a big selling point; yet it is not thought through, and one gets the impression that whoever WROTE the software never actually USED it. Part of the problem (as I have reported to e-on) is that the distinction is overlooked between a material (set of parameters) and a material zone (where those parameters apply). The absence of this distinction leads to a number of difficulties.