The trackback uri has never worked properly and is a real pain in the butt. if you click it you just end up back at the permalink. This is not the trackback uri. The only way for people to use it is to hover over it and manually write it down. That is ridiculous, counter intuitive and counter productive. I had to take to printing it as text.
Please fix it to go to a page with the url in the browser address box or a pop-up with the trackback printed in the window or better yet an option for