Just one of Poser's many dodgy areas. If you want a really weird experience, try doing it with one of the shadow cams. I've had figures un-posing themselves, leaping about all over the shop. As long as everything goes back to where it belongs, it's nothing to worry about apart from the possible effects on your sanity. :) However I have had occasions where moving a figure has caused clothing to un-conform itself and not go back - often a yRot approaching 180 degrees will do this. The solution to this is to only render nude figures. In temples, with a sword (optional). :D