Hello Frank,
You posted this question in the Quantum Mechanic forum, but I think you meant to post it in the Photo Mechanic forum instead. You would likely have gotten a reply much earlier. So if you still have this problem, please repost your question there.
BTW, do you have the problem when copying the NEF files, or the TIFF files? What are your IPTC preferences set to?
Cheers,
Hayo