problem with message/rfc822 parts

[Andreas Amann]

today I updated to the latest git version of notmuch, which mostly works
as expected. 

However, I now have the problem that whenever I look via emacs interface
at a message which contains an embedded message/rfc822 part (like a
forwarded message), then I just see "[ message/rfc822 ]" in the display
buffer. I would expect that I am somehow able to access/view the
forwarded message from the emacs interface, however I do not know how to
achieve this.

This worked fine with notmuch versions from April, but somehow it seems
to be broken now for me. Is this a known problem or do I need some
configuration magic? Any hints for debugging this would be welcome.

Andreas