Displaying attachments in an apparently empty message

[Simon Guest <simon.guest@tesujimath.org>]

People keep sending me mail with no body, just an attachment.
Wanderlust was not showing me anything about the message.

Having raised this on the Debian bug tracker
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=600036
the Debian maintainer suggested the following additions to ~/wl, 

  (setq wl-message-visible-field-list mime-view-visible-field-list)
  (add-to-list 'wl-message-visible-field-list "^Content-Type:")
  (add-to-list 'wl-message-visible-field-list "^Content-disposition:")

Now, I can use v to view, or e to extract the attachment, as when
there is a message body.

Thanks to Tatsuya Kinoshita for this answer.

cheers,
Simon