I believe that I recently got trapped by some switch settings while using
the SB800 with my D70.  The flash was set for TTL and all my pictures were
substantially over-exposed.  It turns out that I had inadvertantly set the
in-camera flash compensation, using the button to the left of the lens mount
and the sub-command dial, to +1.  When I set it back to 0, everything seemed
to work "as normal."

I haven't done extensive testing on the effect of this setting but
appearantly, it adds to the compensation set up on the SB800 and there seems
to be no indication in the viewfinder, or on the top display as to what
value this in-camera flash compensation is set.  Pushing the compensation
button on the camera give a read-out, but the is no warning otherwise that
this is not set to zero.

As I get to know this combination better, I probably won't get trapped (so
often<g>) but if anyone has a "method" of avoiding these sorts of traps
before beginning a session, I'd love to hear.

BTW, it sure was nice not to wait for the negs to come back from the lab to
see my mistakes!

Regards,

D.