Hi,

this change...

,----
| 2004-12-21  Katsumi Yamaoka  <yamaoka@jpl.org>
| 
| 	* rfc2231.el (rfc2231-parse-string): Decode encoded value after
| 	concatenating segments rather than before concatenating them.
| 	Suggested by ARISAWA Akihiro <ari@mbf.ocn.ne.jp>.
`----

... breaks displaying of external body parts for me if the file name
spans more than one line, like this one:

,----
| Content-Type: message/external-body; 
|  name*0*=us-ascii''%2ftmp%2fste%2fgnus%2fattachment-external-body-test-directory;
|  name*1*=%2ftest-file-2.txt; access-type=local-file
`----

Here is an external body part: