locale?

[Marcelo Chiapparini <chiappa@uerj.br>]

Hi!

after apt-get upgrading to fetchmail 5.3.3-1.2. I got the follwing message 


Get:1 http://security.debian.org stable/updates/main fetchmail 5.3.3-1.2 
[319kB]Fetched 15.2kB in 6s 
(2182B/s)                                                 
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LANG = "en.ISO8859-1"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


what does it mean? How can I fix it?
Thanks in advance!

Regards,
Marcelo

-- 
Marcelo Chiapparini
DFT-IF/UERJ
chiappa@uerj.br