title: The "Back" button and the anti-forgery token
body: <p>I'm getting a <code>Runtime error</code> related the the anti-forgery attribute.</p>
  
  <p>Perform the following steps:</p>
  
  <ol>
  <li>Create an MVC web application and start</li>
  <li>Register <strong>joe@acme.org</strong></li>
  <li>Sign out</li>
  <li>Register <strong>jane@acme.org</strong></li>
  <li>Sign out</li>
  <li>Login as <strong>joe@acme.org</strong></li>
  <li>Hit the back button</li>
  <li>Login as <strong>jane@acme.org</strong></li>
  </ol>
  
  <p><strong>Error:</strong> <code>The provided anti-forgery token was meant for a different claims-based user than the current user.</code></p>
  
  <p>What can be done to prevent this error from occurring? </p>