Redirect and additional field broken in 1.5.6

I had my site set up to redirect to a thank you page after booking an appointment using the method outlined in the FAQ, this seems to be broken after the latest update. Do I need modified code or is it just me?

I also have an additional field to be completed on the booking form, in the footer.php of my child theme I have the following code to insert it:

<?php wp_footer(); ?>
<script type="text/javascript">
jQuery(function($) {

This is still inserting my custom field, but my Note field is no longer displayed. It's present in the HTML but the CSS entry reads <div class="appointments-note-field" style="/* display:none; */">

How do I fix this? If I roll back to a previous version of Appointments+ then everything is OK again.