Debian Lenny and perl locales warning messages

If like me you just have upgraded your Debian system to Lenny, you probably encounter the following warnings while launching perl: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings:         LANGUAGE = (unset),         LC_ALL = (unset),         LANG = “fr_FR.UTF-8”     are supported and installed on your system. perl: …