I am sorry so say, but this thread unfortunately is a "stupid me" thread. I forgot to install the headers which here obviously are needed for the propriatary nvidia driver.
I since years know I have to install image AND headers, and I allways do it this way. It seems I was too tired tonight.
Sorry for the noise, towo, kernel 3.16-3 works perfectly as all your kernels did over the last years.
Thanks.