Well, I saw the link that says Salmon is an excellent source of Vitamin D, but when I cross reference Salmon on the USDA site, the USDA site does not include Vitamin D, meaning that it is not present in Atlantic Salmon, either raw or cooked.
HOWEVER, it does show up for Pink Salmon.
So to me, it looks like FitDay is referencing Atlantic Salmon, which happens to contain no Vitamin D. That's all I can figure...
You can search for Salmon yourself here to see what's up:
http://www.nal.usda.gov/fnic/foodcomp/search/