In article <tl7ockmxukr.fsf@m17n.org>, Kenichi Handa <handa@m17n.org> writes:

> I'm not sure.  I've just noticed that the function accepts
> the argument NOERROR.  So, perhaps rmail-show-message-1
> should call mail-unquote-printable-region with that arg t.

I've just got such an error mail.  Save the attached file,
for instance, as "qperror", and do C-u M-x rmail RET qperror
RET to reproduce the problem.  As I don't know the detailed
spec of QP, I can't judge it's surely an error or no.

---
Kenichi Handa
handa@m17n.org