Man, I'm normally such a clear writer.

I think I didn't explain that I WAS walking and I was trying to figure out why the compass was so off. When I took the picture, I had just finished walking in a 40 meter circle and while the compass dutifully pointed magnetic north, the GPS did no such thing.
At the end of the walk, I set the GPS down and then the compass. The needle of the compass remained stable, the compass indicator on the GPS also remained stable - still pointing the wrong way as it was when I was walking, with a 3D fix (9 tracked). I used to sell these things, I know all about what a magnetic vs. a non-magnetic compass is, i think that something is screwy in the 100, which is/was always a piece of crap. I have the 60c by Magellan and that's just a great unit WITH a decent compass.