automatic charset assumption
epa-*-region does not automatically guess the coding system
of encrypted/signed region when charset is not defined.
This prevents me decrypting encrypted/signed messages
on PGP thread on 2ch (famous Japanese BBS site) easily
with Navi2ch (elisp packages for 2ch):
(See comments on Navi2ch thread on 2ch.net)
I am using Emacs 126.96.36.199 and CVS version of Navi2ch.
It should now be fixed in the Emacs CVS.