Permalink trouble

Hi. We’re getting tons of 404 errors in reports from WPMU Firewall that we’ve got some permalinks are incorrect. I’m unable to find: /2012/09/the-shame-of-americas-two-party-duopoly/ralphnader/ even when inserting okobserver.org/ before it like: okobserver.org/2012/09/the-shame-of-americas-two-party-duopoly/ralphnader/
Any idea what could be causing this?
Thanks again.
Bob

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