title: GWT failed to get the serialization policy
body: <p>When I deploy newer version of my GWT application, I get sometimes this log error:</p>
  
  <pre><code>SEVERE: GwtRpcEventSrvc: WARNING: Failed to get the SerializationPolicy 'www.host.com:22041/MYAPP/'; a legacy, 1.3.3 compatible, serialization policy will be 
   a result.                                                                      
  </code></pre>
  
  <ul>
  <li>Question 1) Is it a problem of serialization policy files remaining
  in browser cache?</li>
  <li>Question 2) How to prevent such log message? I tried to add changing
  URL request param to nocache.js (<code>&lt;script
  src="MyApp.nocache.js?v=123"...</code>) but it did not help.</li>
  </ul>