Rails 2.3.1+, Passenger, and Rack 1.0

Just an FYI for those of you running the latest stable Rails.
Rails 2.3.1+ depends on Rack 1.0.  In 2.3.1, it only uses the vendor’d version of Rack 1.0 (which is located under action_controller/vendor).  In 2.3.2, it can use a vendor’d version of Rack 1.0 if the gem isn’t installed in your system.  Rails 2.3.3 depends [...]