"Unknown charset: iso 8859-15"

[Vagn Johansen]

I get the following message

  Unknown charset: iso 8859-15

when I get a mail with a MIME part that specifies charset="iso 8859-15"

    MIME-Version: 1.0
    Content-Type: Multipart/Mixed;
      boundary="Boundary-00=_Q3StKmHAAA4pBAA"
    Message-Id: <200909192115.28927.jj@evalesco.com>

    --Boundary-00=_Q3StKmHAAA4pBAA
    Content-Type: text/plain;
      charset="us-ascii"
    Content-Transfer-Encoding: 7bit
    Content-Disposition: inline

    ... later ...

    --Boundary-00=_Q3StKmHAAA4pBAA
    Content-Type: text/x-diff;
      charset="iso 8859-15";
      name="test_thread.diff"
    Content-Transfer-Encoding: 7bit
    Content-Disposition: attachment;
            filename="test_thread.diff"

How can I fix this problem?

The is some "support" for ISO-8859-15 in mm-util.el but it looks
rather weird.

-- 
Vagn Johansen
Gnus v5.11
GNU Emacs 22.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.12.9) of
2008-05-02 on king, modified by Ubuntu