The actual code for that haxxly doesn't do anything (well - it attempts to load jquery and sets the font tag to arial). Check out http://www.haxx.ly/h/28 for a quick example.
The 406 is the view counter just reporting you've viewed the page. The script error was an error on that particular haxxly.
On HN Redesign http://www.haxx.ly/h/1m And so, doesn't work for me.