Just to add one more note, found this to also be an issue if "Enterprise Mode" is checked under Tools in IE. That is not an option available by default but some environments will enable it to enforce compatibility.
Once unchecked, Splunk will not render correctly. Here is a link with more information about "Enterprise Mode":http://www.eightforums.com/tutorials/43972-ie11-enterprise-mode-enable-disable-users.html
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