character sets

[Kai Wang]

I found the following errors on my mailscanner server. How to
fix the problem?

ignoring text in character set `BIG5'
 at /usr/lib/perl5/site_perl/5.6.0/MIME/Parser/Filer.pm line 646
ignoring text in character set `WINDOWS-1256'
 at /usr/lib/perl5/site_perl/5.6.0/MIME/Parser/Filer.pm line 646
ignoring text in character set `ISO-2022-JP'
 at /usr/lib/perl5/site_perl/5.6.0/MIME/Parser/Filer.pm line 646

Thanks
Kai Wang