I worked with zen-6.x-1.0 following the great documentation and had no problems. Today when trying to mount a theme with zen-6.x-1.1 and Zen folder appears normal, but when I copy the folder starterkit and made the changes in starterkit as the documentation, it does not appear on the page admin/build/themes. I cleaned the caches, rebuild the theme, checked the file permissions and nothing.
Remember that version zen-6.x-1.0 works perfectly and I tried with versions zen-6.x-2.0-beta1 and zen-6.x-2.x-dev without success.
My SO: Ubuntu 9.1.
Thanks and sorry my poor english