About two months ago, I was taking some photos of aircraft at the local
airport.  I got some really great shots from the ramp area of the
hangar.  I was using the 80-200mm f/2.8 which gave me plenty of reach
to the active runway which was only a few hundred feet away.  When I
got home and started to review my photos, I was shocked to see a bright
cyan pixel and a faint cyan line going from the defective pixel to the
bottom of each photo.

So, I sent the camera to the Nikon repair depot.  Nikon sent the camera
back to me a few weeks later with a note that stated that they found a
human hair on the sensor.  They removed the hair, adjusted the
autofocus, etc, etc.  I could not believe that a human hair could cause
a bright cyan pixel on a photo, so I took the camera out for a few test
shots.  The problem was still there but it was hard to see unless you
had a really bright day and a dark background to show some contrast
with the defective pixel.

I sent the camera back to Nikon for a second time.  I also sent a cdrom
with some sample photos that clearly showed the problem.  I attached a
note that explained the problem.  It was blatantly obvious where the
cyan pixel was in every photo.  I received the camera back a few weeks
later with a note that said that they cleaned and adjusted the camera.
Guess what?  Same problem...

Two year warranty on this camera.  I've been using it for about a year.
I called up the Customer Service at Nikon and simply asked what am I
going to do?  I have a problem with a camera that is under warranty.
I've sent sample photos to illustrate the problem.  The camera has been
to the repair depot twice and it still has the same problem.  The
Customer Service guy gave me his account number to have the camera
shipped back to him directly for the repair.  I am happy to say that
the camera appears to be finally fixed.  They replaced the image
sensor.  I'm just glad to have my camera back.  It has been a couple of
months and I can finally start taking photos again.
I really like my D70s.  It has an incredibly long battery life and
enough features to keep me interested in photography for many years to
come.  I like taking pictures of interesting things that the average
person would never have the opportunity to see.  Its what I like to
do...