Why does this [removed] iframe ads code completely break Internet Explorer?

Question

So, I\'m trying to find an answer to why this problem is happening; I\'ve fixed the problem, but I want to know why it happened.

TL;DR

Google-provided conversi

Answer 1

I tried replicating your issue but couldn't on IE9.

Either I don't have the right test setup or it seems IE prior to IE 9 had some bug. Firefox had a simialr bug: https://bugzilla.mozilla.org/show_bug.cgi?id=293633

Maybe its a combination of unclosed iframe and something inside the page that's being rendered.