v4.3.1 released

I don't know if this is the right place to report it, however, after upgrading to version 4.3.1 I noticed that in all my forms this kind of situation doesn't work anymore where I show the error under each input, if I do the submit of the form which should show errors on the required fields for example, the result is that nothing is shown:

PHP Code:

if ($validation->hasError('username')) {
    echo $validation->getError('username');
}