I previously had a problem with the 70-200 VR when a teleconverter was attached. But having read the BJ article the other day I tried out the D3 again with the said lens and it was spot on every time, all shot at f/2.8. BUT - I had previously updated with the newest firmware - 2.00 in A and B. Now, the spiel about this said it would correct some autofocus problems and I just wonder whether this has applied to the 70-200 VR.
It is clearly a Full Frame lens, and when used with a DX camera it is magnificent. But, like a lot of lenses, a FF digital camera will catch out so many 35mm lenses. Even my beloved (and, late) Leica-M 24mm ASPH did not perform particularly well in the corners on the M6, but I guess would be a superlative lens on the M8.
Nikon have provided wonderful FX lenses with the 14-24 and 24-70 and I guess they are working on an 'FX' 70-200 at this very minute.