Unrecognized character set

[SysAdmin, dte.net]

Sorry if this has come up before folks, but when running MHonArc
I just noticed the following warning:

Warning: Unrecognized character set: windows-1252

The source of the email is Microsoft Outlook Express. Everything
is working great regardless of this warning... Is there anything
I could do to stop this warning, or does it even really matter?

Many thanks,
Manuel Alvarez, dte.net