[Mailman-Users] TypeError: unicode() argument 2 must be string, not None

[aaron]

Hello.

I'm getting the following error when rebuilding the archives (using
/mailman/bin/arch) for a list. I was unable to find anything relevant in the
mailman-users archives and would greatly appreciate any suggestions. I'm
running Mailman 2.1.2 on FreeBSD 4.9-RELEASE-p11 with Python 2.1.3.

Updating HTML for article 7152
Updating HTML for article 7151
Updating HTML for article 7153
Updating HTML for article 7155
Updating HTML for article 7154
Pickling archive state into
/home/mailman/archives/private/listname/pipermail.pck
Traceback (most recent call last):
  File "./arch", line 187, in ?
    main()
  File "./arch", line 175, in main
    archiver.processUnixMailbox(fp, start, end)
  File "/home/mailman//Mailman/Archiver/pipermail.py", line 544, in
processUnixMailbox
    m = mbox.next()
  File "/usr/local/lib/python2.1/mailbox.py", line 30, in next
    return self.factory(_Subfile(self.fp, start, stop))
  File "/home/mailman//Mailman/Mailbox.py", line 89, in scrubber
    return mailbox.scrub(msg)
  File "/home/mailman//Mailman/Mailbox.py", line 109, in scrub
    return self._scrubber(self._mlist, msg)
  File "/home/mailman//Mailman/Handlers/Scrubber.py", line 257, in process
    url = save_attachment(mlist, part, dir)
  File "/home/mailman//Mailman/Handlers/Scrubber.py", line 348, in
save_attachment
    fnext = os.path.splitext(msg.get_filename(''))[1]
  File "/home/mailman//pythonlib/email/Message.py", line 707, in
get_filename
    return unicode(newvalue[2], newvalue[0])
TypeError: unicode() argument 2 must be string, not None