I have one question.

  pop3.el in qgnus-0.12 has variable pop3-movemail-file-coding-system , but
  pop3.el in qgnus-0.13 does't have pop3-movemail-file-coding-system.

  Why did you remove this variable...

  I checked pop3.el's version in qgnus-0.13 is "Version: 1.3h" , but 
  pop3.el's version in qgnus-0.12 is "Version: 1.3g".

  I guess Lars forgot apply morioka@jaist.ac.jp's patch.

  Please apply below patch.

>>>>> In <m3k9elol66.fsf@sparky.gnus.org> 
>>>>>	Lars Magne Ingebrigtsen <larsi@ifi.uio.no> wrote:
> Sun Oct 12 23:54:55 1997  ISO-2022-JP  <ichikawa@hv.epson.co.jp>

> 	* gnus-agent.el (gnus-agent-article-file-coding-system): New
> 	variable. 

  I send a gnus-aget patch , but that is may be broken.
  So , I re-send patch to work gnus-agent with mule.

  Thanks.