There seems to be one to many forward slashes (fs) in front of gb_styles.css in the file \components\com_eventbooking\views\event\tmpl\default.php on line 31:
Code:
<link href="<?php echo $greyBox; ?>/gb_styles.css" rel="stylesheet" type="text/css" />
It renders like this:
Code:
mysite.com/components/com_eventbooking/assets/js/greybox//gb_styles.css
EDIT: I also found this
Code:
<script type="text/javascript" src="http://mysite.com/components/com_eventbooking/assets/js/greybox//AJS.js"/>
<script type="text/javascript" src="http://mysite.com/components/com_eventbooking/assets/js/greybox//AJS_fx.js"/>
<script type="text/javascript" src="http://mysite.com/components/com_eventbooking/assets/js/greybox//gb_scripts.js"/>
