Hello everyone,
I've run into, and solved, a small issue related to using GnuPG with mutt/neomutt. This has been fixed for future users, however, if any current users would like to use GnuPG to sign their mail via mutt or neomutt, they will need to add the following line to their ~/.muttrc or ~/.neomuttrc for it to work:
source /usr/local/etc/muttgpg.rc
Otherwise you'll encounter miscellaneous errors related to mutt being unable to communicate with GnuPG.
~ahriman