Hello
I'm having the same issue with Vray 3.00.03. After some tests I found out that it has nothing to do with: Vraycameras, Native cameras, GI. If you create a new scene, create a box and render even from perspective view, after rendering one image after the other you'll notice a small camera shift, kind of a rotation. I haven't found a solution yet, so if some of you do it, please let us know.