You probably have some strings with high-bits set in them. Find out what their encoding is and then apply 
use Encode;
my $perl_string = decode(<encoding>, $original_string);

[download]
where <encoding> can be "iso-8859-1", "utf8" of one of the other encodings available...see Encode help.
Then you can apply s//

Regards.

In reply to Re: Malformed UTF-8 character by Realbot
in thread Malformed UTF-8 character by jeanluca

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