Error in Internet Explorer 9 (not earlier versions or other browsers) when including jQuery in an iframe

Question

Basically I have a page that launched a fancybox iframe. In that iframe I also include jQuery. But when I testing it in Internet Explorer 9 it gives me the error <

Answer 1

This is a related issue: IE9 throws exceptions when loading scripts in iframe. Why?

There seems to be some real issue in Internet Explorer with native global objects such as 'Function' and 'Object' being undefined in some circumstances when scripts are loaded early (in the head section) of an iframe...

I placed a bounty on that other question to get some more attention to it.

From experience I know this issue also exists in IE8, but it was more rare there it seems. Looks like in IE9 it has gotten worse...