D800 is within factory standard! Needs +20 to stop it front focusing.

Send them one of the lenses that requires +20 and quote the D800 manual: Page 338; "AF fine tuning is not recommended in most situations and may interfere with normal focus; use only when required". Page 339; "The camera may be unable to focus at minimum range or at infinity when AF tuning is applied".

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Kind regards
Kaj
http://www.pbase.com/kaj_e
WSSA member #13
It's about time we started to take photography seriously and treat it as a hobby.- Elliott Erwitt