almighty_monkey - 10:36 am on Jul 7, 2011 (gmt 0)
I'm slightly surprised its even still there to be honest. Goog's gotten pretty good at delisting duplicate content as of late.
AG4Life could be onto something there. Also, have you considered adding a canocalisation tag? It's the 'official' solution, may preserve more value from any backlinks to the duplicate content than a 301 will. (Then again, it may not. I actually don't know for sure. Has anyone else got an opinion on this?)