Why can it find a favicon?
The main reason why getfavicon.org can’t find a page favicon is that the page generates the HTML favicon code in a dinamic way, using javascript. An example of this is the site www.philips.com, which loads favicon info via javascript, and browsers can translate them to HTML, but it’s no an easy thing for getfavicon.org, so it’s not planed to implement this feature in future.