Outlook Displaying HTML Code

[RussG]

I have an odd problem. Randomly (or so it appears) mesasges in Outlook are
displaying header HTML code in the body of the message. This is a sample of
what we see some times at the bgeginning of the message body:

??tml xmlns="urn:schemas-microsoft-comml"
xmlns="urn:schemas-microsoft-comfficeffice"
xmlns:w="urn:schemas-microsoft-comffice:word"
xmlns:st1="urn:schemas-microsoft-comffice:smarttags"
xmlns="http/www.w3.org/TR/REC-html40">

It happens in both Outlook 2003 and 2007. We had a 3rd party disclaimer
package running that we thought might be causing it. The package was removed
but it is still happening.

Any suggestions as to where to look?

Thanks for any insight.

Russ G