I saw another message about the same problem on this list, in January, with the advice to upgrade to git, but I'm still seeing it on notmuch 0.16+7~gdc51bf0. Forwarding a message from within emacs using `notmuch-mua-forward-message' sometimes produces garbled encoding. Calling `notmuch-show-forward-message' on the same message, however, creates what appears to be a raw message, properly encoded.
Is there something still amiss in the code? Am I using the wrong command? Thanks! Eric