Mutt converts attachment charset

[Chung-Yeol Lee]

Hello.

I'm using mutt on FreeBSD with 'ko_KR.UTF-8' locale.
To read html attachments in firefox, I have an entry in mailcap as
follows:
text/html; firefox3 -remote 'openURL(file://%s, new-tab)'

The problem is that mutt converts the charset of html when I open the
html attachment.
If the html has <meta charset> tag in it, the charset specified there
and the real charset
(converted by mutt) does not agree and the characters are broken.

So, how can I prevent mutt to convert the charset of attachment?

Thanks in advance.