Ted Zlatanov <tzz@lifelogs.com> writes:

> On Wed, 02 Mar 2011 18:28:13 +0100 Michael Piotrowski <mxp@dynalabs.de> wrote: 
>
> MP> On 2011-03-02, Julien Danjou <julien@danjou.info> wrote:
>>>> The effect is that `mml2015-epg-encrypt' is unable to get the recipient
>>>> from the message and prompts for it.
>>> 
>>> Why? I cannot see why it would fail.
>
> MP> If message-options is buffer-local, it fails.  This is reproducible.
> MP> Whether this is a bug in XEmacs or due to XEmacs-only code at some
> MP> point, I don't know.
>
> Me neither.  I put in code to do the old behavior for XEmacs but hope
> that someone who uses it can tell what's wrong.

I guess the cause is: mml-generate-mime calls mml-generate-mime-1,
etc. in mm-with-multibyte-buffer.  On XEmacs, however,
mm-with-multibyte-buffer is defined using with-temp-buffer and local
variables are not copied into the new buffer.

Here is a patch (not tested).