IE 8.0 RC1 does not render the 'Web Slice' inside 'iframe'

I was testing a previously formatted web page to display the
web slice rendered inside a <iframe/>

Where as "This_has_slice.htm" would render the "slice" as it should.

This one does not,
<iframe src="This_has_slice.htm"></iframe>

You may want to read this article for reference,
http://hodentek.blogspot.com/2009/02/how-to-add-web-slice-to-your-page.html