For GNU Emacs 21.2.1 (powerpc-apple-darwin, X toolkit) of 2003-06-06:
The regexps used by LaTeX mode for `paragraph-start' and
`paragraph-separate' seem a bit too general: namely, using
`forward-paragraph' and then `backward-paragraph' on
a
%b
c
with point on "b"'s line puts point after c and then just before c (this
is because, if I read the regexps correctly, the %comment is considered a
paragraph separator and thus skippable). Similarly back then forth moves
across a both times. This means, most notably, that `fill-paragraph'
won't work on comments. Moreover, `fill-region' on a comment doesn't seem
to deduce the comment's fill-prefix properly -- not sure why on that,
though.
Thanks in advance,
Davis Herring