Having continuing problems with eye focus (see Feb 17 entry), I’ve sent my D3 in to be checked out by Nikon. I could not obtain accurately focused images with a variety of lenses using manual eye focus—even with the D3’s “focus assist” in agreement with my eye. Autofocus has been accurate however.
With previous Nikon DSLRs, such a failing would have been a show-stopper, but the new Live View feature offers a superior alternative for tripod use. However, I shoot handheld with manual focus a great deal (eg Zeiss ZF Lenses), so the D3 had to go in to get this corrected. Now I hope Nikon fixes the problem, not a “given” of course.