It is indeed frustrating, alarming and concerning. As it stands now, I received a response from Nikon's corporate Customer service saying that my samples are inconclusive (if you want to see them - look up few posts earlier with star charts) and that I will need to send the camera in again. That will happen after I get back from Asia in December, but the tone of correspondence so far is not encouraging.
I take it you have some problems with your Nikon gear? Sorry to hear that. I hope you can find ways to deal with that. Please post your experience - that could help others.