Commented Unassigned: Remove formatting button does not work in IE [27721]

Hi There

Using the latest version of the Ajax Contol Toolkit (December 2013 Release) , The remove formatting button in the HTML_Extender does not do anything when using IE9 / IE10 / IE 11 and Firefox. Works fine in chrome.

Regards
Aman Parker
Comments: This can be seen when using the [sample site](http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/HTMLEditorExtender/HTMLEditorExtender.aspx)