They have moved also these favicons (hard-coded in [Swatch][1]):

  http://sstatic.net/sf/favicon.ico  
   http://sstatic.net/su/favicon.ico  
   http://sstatic.net/sa/favicon.ico  


  [1]: https://stackapps.com/questions/316/swatch-a-firefox-plugin-for-monitoring-stack-exchange-sites-for-interesting-chan