p0.95 & p0.96 find no PGP-encrypted content

[Karl Kleinpaste <karl@justresearch.com>]

I've just discovered that 0.95 and 0.96 are unable to decrypt any of
my mail containing PGP-encrypted messages.

I have mailcrypt 3.5.4 and PGP 5.0i (from replay.com's
pgp-5.0i-7.i386.rpm).  However, considering that there is no
*MailCrypt* buffer ever created, and that the minibuf complaint is
"Found no encrypted message in this buffer," I tend to think that 0.9x
has done Something Bad.  Anyone see similar misbehavior, or have
another explanation for what I see?

Well, hang on a minute...

I just tried edebug-defun through mc-decrypt-message, which in turn
led me to edebug-defun on mc-message-delimiter-positions.  This is
most odd: The failure is in not finding the PGP bound delimiter
strings via re-search-forward.  When I execute re-search-forward on my 
own with the exact same arguments, it comes up with the correct buffer 
position, but when run as part of the mailcrypt functions, it returns
nil.

I don't get it.  Is this an XEmacs 21.2 beta bug of some weird sort?

--karl