I created a theme that works in Moodle 2.2.x on a Windows XP machine. Now I am migrating to Ubuntu. I copied the theme directory, cleared the theme cache, rebooted, etc., but I still can't see my theme in the Theme Selector window.
In addition, even on the Windows machine my theme did not appear in the list of themes in the Site administration > Appearance > Themes tree.
Any help is greatly appreciated!