Never mind! Rob got back to me, and I feel silly, since had I actually sat
down with it I think I would have got this--I just sent to the poster:
Rob said:
"The backward 3 is not a backward three - it is the side of two overlapping
paragraph marks that are truncated by the drawing composites. If you open
the header you'll notice there is a frame in there. If you delete that
frame, you'll notice there is another frame in there! There are two frames
in the header, both of which obviously have a paragraph mark. When
formatting marks are turned on, they both get display but are then
overlapped by the paragraphs of the document body making them appear like a
backward 3."
And the reason is because when you use Insert | Page Number, it puts the
number in a frame. Then if you delete the number, often the frame doesn't
get deleted and goes wandering. If you view headers/footers and use the #
icon on the h/f toolbar, though, it will not get put in a frame.
Here's a similar issue:
http://word.mvps.org/faqs/formatting/UnaccountablyIndented.htm
(hit refresh a few times in Safari, or use a different browser)
Daiya