Please find the jsfiddle at http://jsfiddle.net/aTu6q/4/
to replicate the issue. In IE11, when you click on the tab named iframe3, the scrollbar moves upside and down causing a visual flicker. This only happens when adding tabs dynamically using tabstrip.append, but statically added tabs like iframe1 and iframe2 works just fine. We are using the latest kendo version 2013.3.1119 and jquery-1.9.1.Waiting for your answer.