I've had my Nikon D70s for about 6 months. Still learning how to use it, and
enjoying it very much.

I've noticed an intermittent error message that seems to appear from time to
time. On the LCD display panel on the top of the camera, in the exact
location where it normally displays the number of shots remaining, it
occasionally displays a rather cryptic message which reads "CHA"....

Once this error message is displayed, the camera won't take any more
pictures....unless you turn if off for a few minutes... Then everything goes
back to normal. The first 2 or 3 times I saw this,  I though it might be
trying to tell me that it's time to charge the battery (CHA??), however, the
battery level indicator was fine, and I knew for a fact the battery still
had plenty of juice left in it.

I've been digging around on the web, and I found a little information about
this happening on early model D70 cameras, and that it's usually caused by a
faulty [or perhaps unsupported] compact flash card. In a few places, I read
that formatting the memory card will clear the error. However, my camera is
the D70s (and therefore newer) and my memory card is a 1GB Sandisk Extreme
III compact flash. In the last 6 months, I've taken roughly 3,000 photos and
I've seen this error message only 5 or 6 times. As I have said, turning the
camera off for a few minutes usually resolves the issue. Just wondering if
anyone else has experienced this..

Thanks in advance.

Derek