[Spambayes] UnicodeEncodeError raised for bogus Content-Type header

[Jim Correia]

Still evaluating and learning about SpamBayes before attempting to put
it into production use. I ran into a problem where a message (actual
message from my March mail spool) causes a UnicodeEncodeError to be
raised due to a bogus Content-Type header.

As the welcome message suggested, I've written a bug.

1175439

https://sourceforge.net/tracker/index.php?func=detail&aid=1175439&group_id=61702&atid=498103

I see that SpamBayes will sometimes catch exceptions and write an
exception header, but it doesn't in this case.

The exception originates in the email package, and the problem affects
at least two high level scripts, so I'm not even sure where to start
looking to hack together a patch.

Advice or workarounds?

Thanks,
Jim