Eric Abrahamsen <eric@ericabrahamsen.net> writes:

>
> Sorry! It was `notmuch-mua-new-forward-message' I've been using,
> apologies for the confusion. I'm not calling any particular filling
> commands. I've got this in .gnus.el:
>
> (add-hook 'message-mode-hook
> 	  (lambda ()
> 	    (flyspell-mode)
> 	    (orgstruct-mode)))
>

Sorry^2, I don't mean filling in that sense, just that it explicitly
loads the raw message before calling notmuch-mua-new-forward-message.
So although this is not documented (yet!), I suspect that
n-m-n-f-message needs to have the raw message in the buffer (read with
coding-system-for-read as 'no-conversion).

d