I have P6 on a Win XPPro, 64 bit Athlon 3.4GHz, 1.5Gb RAM, and Nvidia GeForce 5600 270mb. I'm having a problem with some pz3's when I try to change any of the detail in the material room, the nodes are flashing on and off, I mean one minute they're there the next they vanish, then back again. If I try to change the details to another part of the item ie. Lcornea, when it flashes on again it has gone back to body, or whatever is the first item on it's list of parts. Has anyone else had this problem or is it just me? Catlin