That Ask.com flash ad is a pain.  It takes up a region of space that is imposed over a large portion of the website, thus creating an invisble object that stands between the page and the cursor.  During it's overdone animation sequence of a saw cutting off the Jeeves part of the site name, you can't click on anything in the upper half of the page.  Perhaps it has something to do with the z-index.  Regardless, it has got to go!