>>>>> In <b9yis4ql3wu.fsf@jpl.org> Katsumi Yamaoka wrote:

> I agree.  Today I found a better way to fix the problem without
> modifying the rfc2047 encoder.  It doesn't require to modify the
> way to build the reply headers either.  The solution is to quote
> decoded words in the " *gnus article copy*" buffer (in which the
> reply headers are extracted) if there are special characters.
> The new patch for the trunk is below.

Please apply the following additional patch.  It is needed so as
not to quote words in the Subject header, etc.