It may just be as a few people have pointed out; it's something with e-Frontier's update service. I had the XML error on maybe Wednesday or Thursday but Poser started up alright so I just ignored it and didn't give it much thought after that because I just though that it was "one of those things" you might get every now and then.  I didn't own V4 then (just got her yesterday) and hadn't put in my preorder for Poser 7 until Friday. Haven't had much problem saving or opening files that I'm aware of but I've been working in Vue 6 since then but think I'll turn off auto updates just to be on the safe side. crosses fingers.