Warning: 'Range.detach' is now a no-op, as per DOM

Hi,

I'm getting the following warning when I'm using Ctrl+S shortcut to save my app state (the cursor caret / selection is in a contenteditable.

``` JavaScript
'Range.detach' is now a no-op, as per DOM (http://dom.spec.whatwg.org/#dom-range-detach). ReactDOMSelection.js:117
```

It happens only on Chrome.

Raul.
