The person I helped out last week found that it is the default setting.
I spoke to a wedding photographer at the weekend, a long-term Nikon user, one of a group that are sponsored by Nikon (ie excellent) and she told me that though the function is fitted to most cameras, even the D3
, it is the default setting only on the lower end models.
In that other thread, I commented that aircraft, particularly against a sky are probably about the worst type of subject for Active D and she agreed. It can be useful on more normal subjects though creating a rather false look, as so often happens with shadow/highlight too,
I suspect that he will have no more problems once that is turned off.