title: XHR.getAllResponseHeaders() does not return headers as expected in Chrome 60
body: <p>In our web-application, we use the <code>XHR.getAllResponseHeaders()</code>-function to fetch the header field names. We use the <code>X-Access-Token</code> to receive a JWT-token which we sent in the next request to keep session. Since today, after login in, each next request resulted in a redirect back to the login page.</p>
  
  <p>Strangely enough, it was only Chrome having this problem, not Firefox or Safari. And it was only on my pc, because my colleague could still login while I couldn't.</p>
  
  <p>We use the same software, some javascript, same everything, so we noted it has to be something with my browser. Tried a re-instal and disabling some plugins, but that didn't matter anything.</p>
  
  <p>I looks like the <code>XHR.getAllResponseHeaders()</code> function returns the wrong values, although we send the right ones from the server... Anyone an idea why it isn't working anymore?</p>