Getting a reference warning during ClickOnce

In a VS2005 project that I am publishing with ClickOnce, a warning message
appears saying "Unable to apply publish properties for item
"microsoft.visualbasic.powerpacks.printing.printfo rm". The project formerly
referenced this object, but it was removed from the References tree node
after all code needing the reference was deleted. It does not show in the
Project References tab under References: or Unused References. It does not
show up under Publish. Applications Files. It is listed in
Publish.Prerequisites, but is unchecked. And finally, I have searched for
"powerpacks" in the code, but found nothing.
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Can anyone else suggest another place to search?
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Thanks in advance...
Dean S
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