Update original to use jQuery.ajax instead of jasmine.XmlHttpRequest. It should play better with jasmine 2.0.

loadFixture.js

var uniqueLoadIndicator = null;
// Loads fixure markup into the DOM as a child of the jasmine_content div
spec.loadFixture = function(fixtureName) {
  var $destination = $('#jasmine_content');

  uniqueLoadIndicator  = null;
  var indicatorScript = "<script>uniqueLoadIndicator = 'loaded';</s" + "cript>";

  // get the markup, inject it into the dom
  $destination.html(spec.fixtureHtml(fixtureName) + indicatorScript);
  while (uniqueLoadIndicator != "loaded") {
    //
    if (console) console.log("Browser wasn't ready... sleeping.");
    spec.retrieveFixture(fixtureName);
  }
  uniqueLoadIndicator = null;

  // keep track of fixture count to fail specs that
  // call loadFixture() more than once
  spec.loadFixtureCount++;
};

// Returns fixture markup as a string. Useful for fixtures that
// represent the response text of ajax requests.
spec.readFixture = function(fixtureName) {
  return spec.fixtureHtml(fixtureName);
};

spec.readJSON = function(fixtureName) {
  var data = spec.fixtureHtml(fixtureName);
  return window.JSON && window.JSON.parse ?
    window.JSON.parse( data ) :
    (new Function("return " + data))();
};

spec.fixtureHtml = function(fixtureName) {
  if (!spec.cachedFixtures[fixtureName]) {
    spec.cachedFixtures[fixtureName] = spec.retrieveFixture(fixtureName);
  }
  return spec.cachedFixtures[fixtureName];
};

spec.retrieveFixture = function(fixtureName) {

  // construct a path to the fixture, including a cache-busting timestamp
  var path = '/spec/javascripts/fixtures/' + fixtureName + "?" + new Date().getTime();
  var responseText;

  // retrieve the fixture markup via xhr request to jasmine server
  try {
    $.ajax(path, {
      dataType: "html",
      complete: function(xhr, status) {
        responseText = xhr.responseText;
      },
      error: function(xhr, status, error) {
        throw new Error("Couldn't load fixture with key: '" + fixtureName + "'. No such file: '" + path + "'.");
      }
    });
  } catch(e) {
    throw new Error("couldn't fetch " + path + ": " + e);
  }

  return responseText;
};

spec.loadFixtureCount = 0;
spec.cachedFixtures = {};