I am having some issues with assembly and shading. When I create a part, save it, then insert it into an assembly there is a shading quandry. The part looses all the edges. In other words it has the appearance of the shade without edges view. All the other parts in the assembly are normal with the edges shown. So to fix this trouble, I cycle back to the part and rebuild it. Like magic, the edges return at both part and assembly levels. I was having the same issue in 2009 and chalked it up to a glitch. However, we have since upgraded to 2010 and the problem remains. I am running a HP XW4300 PC and yes, I have updated the graphics card. Can anyone help out here?