Problem with checkboxes focus in 10.0d

There are some problems with checkboxes and the focus in 10.0d (all browsers). Most of the problems were not present in 8.3d

Here it is a video showing how in 8.3d it worked ok and how it fails in 10.0d: http://screencast.com/t/TxLXssfa

You need to unrar the following file inside "isomorphic\system\reference":

https://mega.co.nz/#!0BgjRTjZ!N-17pIJjL9eVd6F1fDZciINKhxAqCNn7aSQj6iSbjmQ

You can see that the previous things that in 8.3d worked now it doesn't:
* The over effect in the checkbox icon
* The focus effect in the checkbox icon while moving by pressing tab key
* The focus effect in the checkbox icon while doing mouse click works ok, but then the blur effect doesn't remove the focused icon
* Under some random circumstances, the whole checkbox component doesn't take the focus. Although the video is recorded using Chrome, this effect is more noticeable in Firefox: if you just load the html and click in any checkbox, the focus doesn't go to there. It goes just when it has it already going there by pressing tab key.

Thanks and regards.