Mike McEwan <mike(a)lotusland.demon.co.uk> writes:
Why does the cursor disappear on lines 4 and 2?
It moves to the wrong lines. Try enabling line-mumber-mode then you'll
see that on the way down you get on (buffer-)line 1,3,5,7,9 (i.e. the
visible-lines ). However if you press cursor up on line 9 you get to
line 6 instead of seven!
Jan