Yessir, I'm not sure how it was done, but the constraints were messed up. Take this model, delete the bones, name it something like "fix.mdl" and save it. Then, delete the constraints in your model and import "fix.mdl" into your model.
Hope that helps.
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EDIT
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Mark knows best with the 2008 Rig, so go with his suggestions.
Orc_Warrior_rig_update.zip