The following AJAX call is failing in IE.
$.ajax({ url:\"{{SITE_URL}}/content/twitter.json\", dataType:\"json\", error:function(xhr, status, erro
What is the {{SITE_URL}} chunk giving is about. Try looking at the code in view source code of the browser. If the {{SITE _URL}} chunk has a trailing slash and that would make the request url:
http://modomain.com//content/twitter.json
Which could creep IE out?