Im currently using the Vray 1.6 Beta, but the materials are all the standard Vray basic material pack. I bumped the glossy samples up from the base 8 to something like 25. Im not at the office right now but later I will be so ill check on the material settings. Truthfully I think its in the render settings and not the material because it happens across the whole model with any material that has some reflection to it.