You may have noticed that if you create a custom node type that has uses the radios widget, there is no visual error indicator attached to the radios. I added some jQuery to my theme to highlight the label of the radios when there is an error associated with them.
<?php
$(document).ready(function(){
$('form#node-form div.form-item').each(function(){
var result = $(this).find('div.form-radios input.form-radio.error').length;
if (result) {
$(this).find('label:first').removeClass('error').addClass('error');
}
});
});
?>