gpg 1.0.2 using expired key

[jamus jegier]

I have a key that has a expired subkey and a valid subkey.  When I
encrypt using this key with gpg, it uses the expired subkey.  I can use
the correct subkey by specifing the subkey ID (3A55B778) using -r, and
the main key ID (A5ACC779), but not by using "jamus".  Is this a bug?

screen dumps & gpg public key follow:

jamus

gpg -r A5ACC779 --encrypt readme.txt
gpg: using secondary key 3A55B778 instead of primary key A5ACC779

---------------------

gpg --list-key jamus

pub  1024D/A5ACC779 1999-07-24 jamus jegier <jamus@jamus.com>
uid                            Thawte Freemail Member <jamus@jamus.com>
sub  1024g/2770CDE6 1999-07-24 [expires: 2000-05-25]
sub  1024g/3A55B778 2000-06-04 [expires: 2001-06-04]

---------------------

gpg -r jamus --encrypt readme.txt

gpg: key 2770CDE6.59: expired at Thu 25 May 2000 06:44:49 PM EDT
gpg: 2770CDE6: key has expired
1024g/2770CDE6 1999-07-24 "jamus jegier <jamus@jamus.com>"



-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.0.2 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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=taqs
-----END PGP PUBLIC KEY BLOCK-----