The latest versions of ViewNX and Capture NX have been released by Nikon. This update isn't a major overhaul (maybe they should considering Adobe is burning bridges with their customers...) but it does address an issue with D600 RAW files:
When RAW images captured with a D600 running C firmware Ver. 1.01 at an Image area setting of DX (24×16) 1.5× and any Active D-Lighting setting other than Off were opened in ViewNX 2 or Capture NX 2, a bright (whitish) diagonal line was visible. This issue has been resolved.
Download links: ViewNX 2.7.5 and Capture NX 2.4.2