Appears to be working in Firefox but at least Chrome & Safari are broken. Should be a really recent regression so very few possible changes to blame...

Easiest repo: the todo list on our homepage.

/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule ReactDOMOption
 */
'use strict';
var ReactChildren = require('ReactChildren');
var ReactDOMSelect = require('ReactDOMSelect');
var warning = require('warning');
/**
 * Implements an <option> native component that warns when `selected` is set.
 */
var ReactDOMOption = {
  mountWrapper: function(inst, props, nativeParent) {
    
    if (__DEV__) {
      warning(