current mailman class and templates on newer puppet and distro:
Warning: /Stage[main]/Mailman::Listserve/Exec[dpkg-reconfigure mailman]: Skipping because of failed dependencies
Error: invalid byte sequence in UTF-8
Error: /Stage[main]/Mailman::Webui/File[/etc/mailman/fr/listinfo.html]/content: change from {md5}758d1040b52a79891ea3fe4ae206b3ef to {md5}4334e7ddc4c307abc6158e221fc962f9 failed: invalid byte sequence in UTF-8
~/wmf/puppet/modules/mailman/files/templates$ find . -name listinfo.html -exec file {} \;
./fr/listinfo.html: HTML document, ISO-8859 text
./de/listinfo.html: HTML document, ISO-8859 text
./hu/listinfo.html: HTML document, UTF-8 Unicode text
./zh/listinfo.html: HTML document, UTF-8 Unicode text
./pt_BR/listinfo.html: HTML document, UTF-8 Unicode text
./ta/listinfo.html: HTML document, UTF-8 Unicode text
./ro/listinfo.html: HTML document, ASCII text
./ca/listinfo.html: HTML document, ISO-8859 text
./ja/listinfo.html: HTML document, UTF-8 Unicode text
./sv/listinfo.html: HTML document, UTF-8 Unicode text
./pl/listinfo.html: HTML document, UTF-8 Unicode text
./ar/listinfo.html: HTML document, UTF-8 Unicode text
./nl/listinfo.html: HTML document, ASCII text
./sk/listinfo.html: HTML document, UTF-8 Unicode text
./uk/listinfo.html: HTML document, UTF-8 Unicode text
./ko/listinfo.html: HTML document, ISO-8859 text
./cs/listinfo.html: HTML document, UTF-8 Unicode text
./he/listinfo.html: HTML document, UTF-8 Unicode text
./lt/listinfo.html: HTML document, UTF-8 Unicode text
./vi/listinfo.html: HTML document, UTF-8 Unicode text
./ru/listinfo.html: HTML document, UTF-8 Unicode text
./no/listinfo.html: HTML document, UTF-8 Unicode text
./hi/listinfo.html: HTML document, UTF-8 Unicode text
./es/listinfo.html: HTML document, ISO-8859 text
./it/listinfo.html: HTML document, ASCII text
./fi/listinfo.html: HTML document, ISO-8859 text
./id/listinfo.html: HTML document, ASCII text
./hr/listinfo.html: HTML document, UTF-8 Unicode text
./tr/listinfo.html: HTML document, UTF-8 Unicode text
./fa/listinfo.html: HTML document, UTF-8 Unicode text
./pt/listinfo.html: HTML document, UTF-8 Unicode text
./en/listinfo.html: HTML document, ASCII text