Why does jsfiddle ignore gist css files?

Adding a gist css-file to jsfiddle by "Add Resources" url does not seem to work. Am I missing something or is it not supported?

Fiddle that does not load from url:

http://jsfiddle.net/keffot/开发者_如何学JAVAdpWWz/

Fiddle with css content copied to css-frame:

http://jsfiddle.net/keffot/DTFfK/

Yep. The problem is in the https. I've added the same file but from my dropbox public folder and here is result: http://jsfiddle.net/dpWWz/3/

Link to the file is: http://dl.dropbox.com/u/18372729/page-layout.css