When I played around it on an Angularjs project on IE8 after jumping several pages, an popup window tells:
"Stop running this script?
A script on this page is causing Internet Explorer to run slowly. If it continues to run, your computer might become unresponsive. "
Not sure what reason causes this problem. I put 'behaviour(pie.htc)' on several elements for drop-shadow on IE8. It works fine and looks great on start loading the page. And there is no message to tell on IE8 developer console.
I am using LESS and Angularjs framework, all pages are dynamic pages.