Simon Josefsson <jas@extundo.com> writes:

> No error message?  Could you forward a copy of the mail?  (Or a
> similar behaving one without sensitive information.)

such mail is available from the public NNTP server news.gmane.org in
gmane.network.leafnode.announce.

Note the failing mail is "traditional pgp" as mutt calls it, not MIME. A
PGP/MIME signed multipart that Oliver Braun sent to one of the FreeBSD
mailing lists recently displayed fine, pressing `W s' on that mail then
verifies the signature and adds a bold button to the top with the
results.

I'm attaching a mail that shows this problem. I hope attaching it
doesn't make the problem disappear.

-- 
Matthias Andree