[jQuery] [validate] URL validation failing on a valid URL.

Is there a reason why URL validation is failing on the following URL?
http://purchase.tickets.com/buy/TicketPurchase?organ_val=22031&perfcode=BD0608&perfsubcode=2008
It works fine on any other URLs I've tried.
My jQuery code looks like this:
jQuery(document).ready(function($){
$('#theForm').validate({
errorClass: 'validationError',
rules: {
url: {
url: true
},
email: {
email: true
}
}
});
});