title: Store not being read or recognized
body: <p>I get this error when I try to start up my ExtJS 4.2 app:</p>
  
  <p><code>Uncaught TypeError: Cannot read property 'buffered' of undefined</code></p>
  
  <p>I've double checked all my <code>store</code> ids and and names to ensure that they are all spelt correctly but I'm still having this issue :(. Is there anything else I could try to solve this error?</p>
  
  <p>Thanks in advance.</p>