WICKET-2771 lost from 1.4.x?

I'm pretty confused here... It looks like WICKET-2771 was implemented in the 1.4.x branch:

Checkbox set in markup is not cleared after first response

Hello, Given: - I'm using Wicket 1.3.6. - A page containing a form containing an unchecked checkbox is sent to the browser. - The user does not check the box, and submits the form. - The form fails validation, and the same page is rendered again as the response. I find that suddenly the