No subject

Subject: libkcal-1865126027.100
Kmail shows:
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This is a Kolab Groupware object.
To view this object you will need an email client that can understand the Kolab Groupware format.
For a list of such email clients please visit
http://www.kolab.org/kolab2-clients.html
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Then from 11/07/2006 - Present the entries look like this again (like the first example):
Subject: iCal libkcal-1245565591.189
Kmail understands the content and displays it in a rubber-banded box.

I can provide examples (view source of email) if it would be helpful.  I'm sure I can find a couple with non-confidential information.

Thanks,
Matt