Hi Nick,

Nick Dokos <nicholas.dokos@hp.com> writes:

> Running M-q in a draft message with orgstruct++-mode enabled gives me
> the appended backtrace.
>
> The problem seems to have been introduced by commit 84a358e3.  Git blame
> fingers the following two as the most recent commits that affected
> org-fill-paragraph:
>
> 187f77a2 2012-04-04
> 84a358e3 2012-04-26
>
> With the first one in force, I don't get the problem; with
> the second, I do.

Can you try this patch against sendmail.el and report?