jQuery 1.9b1 changed a context (value of 'this') in piped promises.

• http://jsfiddle.net/8qCkf/1/ (1.8.2)
• http://jsfiddle.net/gUgMJ/1/ (1.9.0pre)

This change affects codes that expect context to be propagated such as:

function ajaxWithRescueFrom404(settings) {
  return $.ajax(settings).then(null, function (xhr, status) {
    return (xhr.status === 404)
      ? $.Deferred().resolveWith(this, ['', status, xhr])
      : this;
  });
}

ajaxWithResuceFrom404({ url: ... }).done(function () {
  // Treat 404 response as same as succeeded response.
  // Expect that 'this' is a settings object.
});

The commit https://github.com/nanto/jquery/commit/cdac527be80fb2c6585ce6f53a83d4a9144fbf4d fixes this problem.