Yup, I already tried that script and I believe it's out of date. Open pull request at https://github.com/mojombo/jekyll/pull/477

edit: I've just realised I don't need the code to be merged into jekyll in order to use it (facepalm).

edit2: ok, maybe not as straightforward as I thought. I'm not really a coder so it takes me longer to understand what scripts are doing (and then tweak them so they work for me).