Missing message-id links for some archived messages

This message:
http://archives.postgresql.org/pgsql-hackers/2007-03/msg00265.php
has Message-ID 45EBF1A2.5040402@enterprisedb.com according to the
copy in my mail archives, but the link
http://archives.postgresql.org/message-id/45EBF1A2.5040402@enterprisedb.com
is a 404.

Likewise for
http://archives.postgresql.org/pgsql-hackers/2007-03/msg01214.php
which has Message-ID 4601065F.3060100@enterprisedb.com.

I can't tell how widespread the problem is, but these two just happen to
be the first two links on Bruce's current patch queue, which is a bit
discouraging :-(

BTW, is there a way to get the message-id from the regular archive
pages?  Should we expend the screen space to display it?
        regards, tom lane