Reduced Testcase: -ms-expand

HTML

<!--
  A reduced testcase for http://stackoverflow.com/a/13471381/1012875

  2012 by timpietrusky.com
-->

<select>
  <option></option>
  <option>Element 1</option>
  <option>Element 2</option>
  <option>Element 3</option>
  <option>Element 4</option>
</select>

CSS

body {
  margin:2em;  
}

select::-ms-expand {
  display: none;
}