yes and i have the same problem when i use a theme. the problem is only the setup backgrounds. windows wallpaper,icons etc works fine. i hope you can fix this thnks.
Just an idea : Are you using a wccf (presets file) to load your settings ? If yes, please check the paths of all theme files, because if the files don't exist they will be automatically skipped. To bypass this, just reload the theme in EX-100.