If somebody still reaches this page, wondering why the ie targeting doesnt work. IE 10 and onward no longer support conditional comments. From the MS official website: 
Support for conditional comments has been removed in Internet Explorer
  10 standards and quirks modes for improved interoperability and
  compliance with HTML5.
Please see here for more details: http://msdn.microsoft.com/en-us/library/ie/hh801214(v=vs.85).aspx
If you desperately need to target ie, you can use this jquery code to add a ie class to  and then use .ie class in your css to target ie browsers. 
if ($.browser.msie) {
 $("html").addClass("ie");
}