title: Attempted to handle event `willCommit` on while in state root.loaded.updated.inFlight
body: <p>I'm learning how to use EmberJS by doing the introductory tutorial form the "Getting started" page. However, when I get to the "Accepting edits" part, I have a bug:</p>
  
  <pre><code>Uncaught Error: Attempted to handle event `willCommit` on &lt;Todos.Todo:ember304:3&gt; while in state root.loaded.updated.inFlight. 
  </code></pre>
  
  <p>The call to <code>Todos.TodoController.acceptChanges()</code> seems to be triggering that error. The part I'm referring about is this one:
  <a href="http://emberjs.com/guides/getting-started/accepting-edits/" rel="nofollow">http://emberjs.com/guides/getting-started/accepting-edits/</a></p>
  
  <p>After reading up on model lifecycle in Ember - <a href="http://emberjs.com/guides/models/model-lifecycle/#toc_in-flight" rel="nofollow">http://emberjs.com/guides/models/model-lifecycle/#toc_in-flight</a> - I still don't get why this bug appears.</p>
  
  <p>One work-around is to save the model each time it changes (so every time the value of the <code>&lt;input&gt;</code> changes. Which works fine but would probably perform poorly with a HTTP API (as opposed to fixtures).</p>
  
  <p>Could this be due to BC breaking changes in the <code>ember-data</code> lib?
  What else could cause this?</p>
  
  <hr>
  
  <p>Versions of libraries I've used:</p>
  
  <p>jQuery: 2.0.3</p>
  
  <p>Handlebars 1.0.0</p>
  
  <p>EmberJS: 1.0.0 RC7</p>
  
  <p>Ember Data: v0.13-102-g6bdebe7</p>