Trying Edge Rails but get unexpected behavour

Hi all, I've create a rails app (with rails name), then I checked out edge-rails into vendor/rails. Also I added the line

Rails::Initializer.run do |config|   config.load_paths += %W( #{RAILS_ROOT}/vendor/rails/activeresource/lib ) end

in config/environment.rb.

Finally I ran: rake rails:update

So I think that's all I had to do to have my app using edge-rails. Well, after stand up the server, I go to http://localhost:3000/ and all seems ok, but when I go to 'About your application's environment' link, I don't get any response from the server, neither the request is showed in the console. But when I close the server (Ctrl-C) the environment information is showed at the browser and the console writes:

127.0.0.1 - - [04/Dec/2006:16:11:24 CET] "GET /rails/info/properties HTTP/1.1" 200 999 - -> /rails/info/properties

Any idea about what's happening? Also I didn't get javascript errors....