Perfect example...
...why you shouldn't let others run your browser. In many cases black / white -lists are only hurting your options, nothing more or less.
And just to explain how utterly ridiculous this is: kernel.org doesn't even run advertisements (#1 source of virusses and other nasty malware).
Still.. I wonder if their javacode code has anything to do with this. Opera (developer mode) spots a lot of javascript code from an "unknown domain".