Issue with devise

Hi all,
I am getting this error when i reset passwords - it throws to this error message. It still sends out the email, and allows me to reset the password. Any ideas whats causing this so i can fix it? Cheers

ActionController::UnknownFormat in Devise::PasswordsController#create
ActionController::UnknownFormat

        (options.delete(:responder) || self.class.responder).call(self, resources, options)
      else
        raise ActionController::UnknownFormat
      end
    end

Its ok, i worked out that its down to my password routes :/ now to fix them hahah :D

I am having the same error (with Devise within an engine) - can you say more about your solution?