gistfile1.rb

# This is a middleware to fix the Rack env hash issue with nginx passenger

class NginxPassengerFix
  def initialize(app)
    @app = app
  end

  def call(env)
    # Very dodgy hax to correct the PATH_INFO
    env["PATH_INFO"] = env["REQUEST_URI"].sub(/\?[^\?]*$/, "")
    r = @app.call(env)
  end
end

# In your config.ru
use NginxPassengerFix