Asp.Net smartnavigation loses stylesheet

If any one has tried turning Smartnavigation on, they know what I am talking about. There seems to be a bug which cause the page to lose the stylesheet which you have put at the top of your page. The simple solution is to add the stylesheet dynamically. So instead of :
< link href=”../includes/styles.css>
 

you need to do this :…………..
 
  document.createStyleSheet(“../includes/styles.css”);