title: Safari doesn't allow AJAX Requests after form submit?
body: <p>I am writing a Javascript based upload progress meter. I want to use the standard multipart submit method (rather than submitting the file in an iframe). During the submit, I send ajax requests that return the % complete of the upload and then update the progress meter accordingly. </p>
  
  <p>This all works smoothly in FireFox &amp; IE. However, Safari seems prevent the completion of ajax requests after the main form has been submitted.  In the debugger, I can see the request headers, but it appears as though the response is never received.</p>
  
  <p>Anyone aware of this, or how to get around it?</p>