Well, it's all too easy apparently. We stumbled upon the problem when suddenly our web application crashed left and right on us in IE 7.
I've since reduced the code involved and created a plugin to jQuery to make it easier to reproduce this.
Well, maybe perhaps sometimes somebody even discovers a use for the crashIE7 jQuery plugin. :)
In any event - it was fun creating this. :)
See the blog post page for the attached source and how to use this.