• Added HTMLCollection.prototype[Symbol.iterator], so you can use for-of loops over HTMLCollections now. (@i8-pi)
• Fixed file.lastModified to return the current time as the default, instead of 0.
• Fixed cloning of Attrs to properly clone the namespace prefix.
• Tweaked XMLHttpRequest progress event ordering slightly to better match the spec and browsers.
• Tweaked the behavior of calling event.stopPropagation and event.stopImmediatePropagation on already-dispatched events, per the latest changes to the DOM Standard.