This is because Adept is ran as root (via kdesu/kdesudo). It is an issue, but a workaround is to start System Settings as root (kdesudo systemsettings) and setting the style from there.
This is because Adept is ran as root (via kdesu/kdesudo). It is an issue, but a workaround is to start System Settings as root (kdesudo systemsettings) and setting the style from there.