[mew-int 2346] Error sending messages from +queue?

[Havard Eidnes]

Hi,

I recently started using Mew 5.2, and today I sent my first
GPG-signed e-mail after the upgrade.  It didn't go all that
well...

Here's an excerpt from my *Messages* buffer:

+draft/108 has been queued to +queue/2 (from Draft mode)

Message signed etc., pressing C-c C-c:

Flushing +queue...
Connecting to the SMTP server...done
Sending in background...
error in process filter: mew-smtp-command-done: Wrong type argument: char-or-string-p, ("+outbox")
error in process filter: Wrong type argument: char-or-string-p, ("+outbox")

and later attempts at C-c C-c from e.g. +inbox results in:

+queue is locked

and the message has not gone out.

In my .emacs I have

(custom-set-variables
; ...
 '(mew-fcc "+outbox")
; ...

and the 2.mqi file corresponding to the offending message from my
+queue folder looks like this:

["To: auto-dbm at example.com\nSubject: xxxxxxxxx: Havard Eidnes <he at example.com>\nFcc: +outbox\nX-Mailer: Mew version 5.2 on Emacs 21.4 / Mule 5.0 (SAKAKI)\n"
 ("auto-dbm at example.com")
 ("auto-dbm at example.com")
 nil
 ("+outbox")
 "<20070823.121038.03388904.he at example.com>" "2007/08/23 12:10:38" nil]

So...  Is there a bug here?  Where is the folder lock that Mew
thinks is there, and how do I get the queued message out the door?

Regards,

- Håvard