Hello,

After updating to React 15.0.1, we are getting the following error:

```
Uncaught TypeError: Cannot read property 'addEventListener' of null
```

![image](https://cloud.githubusercontent.com/assets/4996164/14602577/5bb4e9f2-0571-11e6-9aa1-98de49f50d76.png)

var refsChanged = ReactRef.shouldUpdateRefs(
      prevElement,
      nextElement
    );
    if (refsChanged) {
      ReactRef.detachRefs(internalInstance, prevElement);
    }
    internalInstance.receiveComponent(nextElement, transaction, context);
    if (refsChanged &&
        internalInstance._currentElement &&
        internalInstance._currentElement.ref != null) {
      transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
    }
    if (__DEV__) {
      if (internalInstance._debugID !== 0) {
        ReactInstrumentation.debugTool.onEndReconcilerTimer(
          internalInstance._debugID,
          'receiveComponent'
        );
        ReactInstrumentation.debugTool.onUpdateComponent(
          internalInstance._debugID
        );
      }
    }
  },
  /**
   * Flush any dirty changes in a component.
   *
   * @param {ReactComponent} internalInstance
   * @param {ReactReconcileTransaction} transaction