Support » Fixing WordPress » “Unbound Prefix” error message for Feedburner Comments Feed

  • I’m trying to set up my Feedburner comments feed (, but I get the following error message:

    The URL does not appear to reference a valid XML file. We encountered the following problem: Error on line 430: The prefix “fb” for element “fb:name” is not bound.


    Reference to undeclared namespace prefix: ‘fb’.
    Line: 430 Character: 95

    I have the FeedBurner FeedSmith plugin installed, and also Adam Hupp’s Facebook Connect plugin.

    On one of my posts, someone named Alan J. Bauman who had logged in with Facebook left a comment. The following line (line 430) in the Comments feed log file is the offending one:

    ‘<title>Comment on Recession Quiz by <fb:name linked=”false” useyou=”false” uid=”1009958411″>Alan J. Bauman</fb:name></title>’

    This is the full error log file page:

    How can I fix this error so I can set up my comments feed? Are comments left via Facebook inherently incompatible with WordPress and Feedburner?

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