title: Continual "transport close" on client
body: <p>I've setup socket.io v.1.4.5 w express and I have been unable to trace the reason for unexplainable disconnects on the clients. The reason given by the disconnect event on the client is "transport close." It happens very consistently on some clients. </p>
  
  <p>Is there any explanation for a client getting "transport close" disconnects on what seems to be a timed interval? The client reconnects just fine but it causes extreme inconvenience because it happens so frequently.  </p>
  
  <p>I've tried various settings, like changing the pingInterval, pingTimeout and the port for websockets (I am now using port 80). But no matter what I seem to do, the problem never goes away. </p>