Ok, I opened a ticket on the WordPress development bug tracker about this.
Did you go to the ‘Network Admin’ dashboard and ‘Network enable’ the themes?
I have tried to customize my child theme according to these instructions. Unfortunately my side bar is actually below the page content, not on the side. hansbeen, the sidebar layout on your site at http://kirtan.nu/ is exactly how I would like to get mine to look like. Could you post your style.css code so I can see how it fits in it’s entirety?