As a developer its a very common problem to me that IE gives me a tough time. But as they say within impossible it is written i am possible. So i do also inhale it.

Here is a quick solution of the above problem:

1. Download the Latest Version of the Cufon
2. Before the Cufon Replacement i.e Cufon.replace(), add the following conditional statements.

<!--[if gte IE 9]>
	<script type="text/javascript">
		Cufon.set('engine', 'canvas');
	</script>
<![endif]-->

3. Make Internet Explorer 9 behave like IE8 by adding this to the header (just before the closing tag should do the trick):

<meta http-equiv="X-UA-Compatible" content="IE=8" />

Kindly use both 2 and 3, sometimes using only one doesn’t solve the issue, so it is safe to use both.  Let me know if the issue still persist.