Rails2.3.1でopensocial-ruby-clientが動かない件

Rails2.3のRack統合でActionController::AbstractRequestがActionController::Requestに統合されたのが原因だった模様。下記のように書き換えて対処。

module OAuth::RequestProxy #:nodoc: all
  class ActionControllerRequest < OAuth::RequestProxy::Base
    # proxies ActionController::AbstractRequest
    if ActionController.const_defined?(:AbstractRequest)
      proxies ActionController::AbstractRequest
    else
      proxies ActionController::Request
    end
# ...
end