Add a note on trouble shooting message-mode encryption

diff --git a/emacstips.mdwn b/emacstips.mdwn
index cba784967f1c61ff97266f2ccab0744cee6b2bb4..d3270d2445338a59b46c3f7782c7c2c97090e1c5 100644 (file)
--- a/emacstips.mdwn
+++ b/emacstips.mdwn
@@ -310,3 +310,11 @@ is not required).
 Alternatively, you may prefer to use `mml-secure-message-sign-pgpmime` instead
 of `mml-secure-sign-pgpmime` to sign the whole message instead of just one
 part.
+
+### Troubleshooting message-mode gpg support
+
+- If you have trouble with expired subkeys, you may have encounted
+  emacs bug #7931.  This is fixed in git commit 301ea744c on
+  2011-02-02.  Note that if you have the Debian package easypg
+  installed, it will shadow the fixed version of easypg included with
+  emacs.