Unable to receive eventsource close event

[amitpatelx]

  sse_stream do |out|
      out.callback do
           puts "Client is diconnected"
       end
      EM.add_periodic_timer(1) do 
        out.push :event => "timer", :data => Time.now.to_s
      end
  end

It doesn't receive close event after closing eventsource from the browser. Hoever browser stops receiving further data.

Tested on Chrome 23.0.1271.97 and FF 17.0.1