The User Level Themes plugin allows a site admin to specify the site's theme based on the user's access level.
The User Level Themes plugin attempts to revert to the theme (labeled as the "Default Theme") was being utilized at the time the User Level Themes plugin was initially activated. However, if this theme is no longer available then the User Level Themes plugin will allow the WordPress core to select the next available theme in the theme list. The selected theme will then be displayed for all user levels.
New feature requests may be submitted via the User Level Themes Feature Request Forum.
New issue submissions may be submitted via the User Level Themes Issue Submission Forum.