Binary package hint: muttprint
Most of the international doc files in /usr/share/doc/muttprint have not been translated to utf-8. For languages with a lot of diacritics (French, Spanish, German etc.), the doc files affected are close to unreadable in a deafult utf-8 environment.
Affected are (AFAIS):
$ find /usr/share/doc/muttprint -type f -not -name \*.gz -exec file -i {} \;
/usr/share/doc/muttprint/sample-muttprintrc-es: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/sample-muttprintrc-nl: text/plain; charset=us-ascii
/usr/share/doc/muttprint/sample-muttprintrc-si: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/sample-muttprintrc-de: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/README: text/plain; charset=us-ascii
/usr/share/doc/muttprint/copyright: text/plain; charset=utf-8
/usr/share/doc/muttprint/README.Latex: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/sample-muttprintrc-en: text/plain; charset=us-ascii
/usr/share/doc/muttprint/sample-muttprintrc-fr: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/README.Gnus: text/x-lisp; charset=iso-8859-1
/usr/share/doc/muttprint/README.es: text/plain; charset=iso-8859-1
/usr/share/doc/muttprint/sample-muttprintrc-it: text/plain; charset=iso-8859-1