I am new to Notmuch. I have compiled it under Debian Sid (x86-64 architecture)
from the latest git revision:
commit 44df403ccd2fa637dfa543f749a949454245b182 (branch master)
and indexed my maildir folders, which are populated by fetchmail -> Postfix ->
Procmail.

The problem is that for certain messages, notmuch show treats the entire
message, including, significantly, all of the headers, as the message body.

An example is attached, with "notmuch show" output as the first file and the
original message as the second.

Suggestions are welcome.