Problem

There seems to be a conflict between some host installations of the SiteZen site builder and the Zen directory name. Some issues you may experience:

• Drupal tabs appear broken without pretty light-grey background images.
• Much of the site appears un-styled because Zen's css files are "not found". (But turning on CSS Aggregation temporarily fixes that problem.)
• Trying to go to admin/build/themes/settings/zen gives you a "404 Page Not Found" error.

Solution for Drupal 6

If you experience this problem, it can easily be fixed by following these short instructions:

1. Change the name of the 2 theme directories from "zen" to "Zen".

   In other words: zen/zen becomes Zen/Zen

2. Visit the admin/build/themes page on your website. Just going to that page causes Drupal 6 to re-build its cache of theme .info file data.

Solution for Drupal 7

If you experience this problem, it can easily be fixed by following these short instructions:

1. Change the name of the theme directory from "zen" to "Zen".
2. Change the name of the "zen.info" file to Zen.info.
3. Visit the admin/appearance page on your website. Just going to that page causes Drupal 7 to re-build its cache of theme .info file data.

You can read the full discussion about this issue in Zen’s issue queue.