Is there any way, other than the ignore list, to stop sites from hanging the IE browser by resending the ad/cookie? Most of the sites will try to send the ad/cookie once and if it fails, they give up, allowing the page to be loaded. Doubleclick, yieldmanager, atdmt, zedo, and fastclick are thwarting this by rapidly sending the ad/cookie call over and over, so quickly that it causes IE to hang. It's basically a DoS attack and the only way I can see to prevent it is to put those sites on ignore. That allows the largest ad purveyors to effectively force you to comply with tracking. Also, I've seen this problem misdiagnosed in a lot different forums, so you may want to mention it on the web site. I've seen a number of post referring folks to PC repair shops, because they mistake the rapid clicking of the ad calls for a hardware problem.