You browse to your favorite news site. The content starts loading, you"ve already started reading the headline, and then it happens. Those of you familiar with the operation aborted dialog know that it spells sudden doom for the website you"re currently viewing. Unsuspecting users have no idea what it means and simply click "OK" and then watch in horror as the web page they were just reading disappears; only to be replaced by an navigation error screen. More savvy users move the dialog out of the way so that they can finish reading what was visible before they too accept the inevitable...
This dialog (and its side-effects) is gone in Internet Explorer 8 Beta 1.
Have you ever seen this dialog while surfing the web in Internet Explorer?