I experienced a colour shift/saturation drop in my photographs when I processed them using the noise reduction software, Noiseware. The original images looked fine after converting to JPEG from the RAW files, but there is a significant change in colour/saturation when opening the JPEG/TIFF files in Noiseware. I realised this only after upgrading the Nikon ViewNX software to the newest version of ViewNX 2.

Read on to find out how I managed to resolve the issue :)
http://www.truphotos.com/2010/10/25/colour-shift-in-images-after-noise-reduction-in-noiseware/