That's all because whole directory /var/lib/gdm/.gconf/desktop/gnome/interface gets deleted by checking that accessibility checkbox, taking down the according %gconf.xml file with it. Manual recreation of this directory a it's contents fixes it until next click on the ACODBIT (Accessibility-Checkbox-Of-Death-By-Inappropriate-Theme).
That's all because whole directory /var/lib/ gdm/.gconf/ desktop/ gnome/interface gets deleted by checking that accessibility checkbox, taking down the according %gconf.xml file with it. Manual recreation of this directory a it's contents fixes it until next click on the ACODBIT (Accessibility- Checkbox- Of-Death- By-Inappropriat e-Theme) .