Garry, problem is non existing/incorrect favicon.ico or server setting, take a look...I can't see favicon using direct link:
http://www.inkjetcartridgesuk.com/favicon.ico
You can put the following line in the home.tpl file to be 100% secure about favicon link:
Code:
<link href="http://www.inkjetcartridgesuk.com/favicon.ico" rel="SHORTCUT ICON" />