Ooops. My mistake. The information I was referring to was a .pdf sales brochure from the Nikon web site.
In any event I completely glossed over the statement that the vignetting problem specific to the use of those lenses when used with the built in Speedlight.
But this brings to mind a follow-up question. Why the warning on those three lenses and not others. If it's a question of Speedlight coverage then won't the problem show up in all of their wide angle prime lenses too?
I assume the answer to this is that Nikon expects users to be aware of vignetting problems when using the cheap built-in flash with wide-angle lenses. But when using their zooms Nikon wants to let people know at what focal length vignetting becomes an issue.