[cflsystems]

4.4.5 has issues with XC OPC in IE. You may experience one or more of the following: shipping and/or payment methods will not update when changed, cart contents may disappear when changing shipping methods, the selected shipping and/or payment methods may not highlight when changed until you click second time of it. This is also present on the demo site. XC 4.4.5 comes with jquery 1.7.1 and in my testing this is the reason fo rthe above. Replace the jqury load call in service_js.tpl with version 1.6.2 and all works. the easiest way just replace the line with

<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>