Looks like when using Word as an editor for Outlook and the Mail to
Weblog feature have some issues that can break the RSS feed. If a
smart tag or other "odd" HTML gets included in the e-mail (as often
does when copy/paste from Word or using Outlook), this can cause
the RSS feed to only return a thrown exception string.
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Looks like word is including invalid XML elements. Can you
paste an example here?
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Still waiting for an example file...
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here's an example.
Example e-mail with this problem
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Are you still having this problem? Do you have a call stack?