>>>>> In <yotly99a4qoz.fsf@jpl.org>
>>>>>	Katsumi Yamaoka <yamaoka@jpl.org> wrote:

> There's a problem that the first `Topics' part may contain non-
> ascii subject string, and it will be sent without being encoded.

> --- gnus-uu.el~	2002-04-12 11:46:57 +0000
> +++ gnus-uu.el	2002-10-07 08:03:29 +0000

I decided to use the following advice for the time being.
(You have to change "< #XXX YYY=ZZZ >" to "<#XXX YYY=ZZZ>")