For all the people getting this error on 1.5.0:
Message: HTML Parsing Error: Unable to modify the parent container element before the child element is closed (KB927917)
Move this code in your FORUMHOME template:
Code:
<script type="text/javascript">
var mytabs=new ddajaxtabs("ajaxTFH", "ajaxTFHcontentarea")
mytabs.setpersist(true)
mytabs.setselectedClassTarget("link")
mytabs.init()
</script>
To just before </body> and then it works fine... this seems to be an issue in IE8 on some templates.