Ekiga got an invalid value for the GConf key "/apps/ekiga/general/gconf_test_age".
It probably means that your GConf schemas have not been correctly installed or the that permissions are not correct.
Please check the FAQ (http://www.ekiga.org/), the troubleshooting section of the GConf site (http://www.gnome.org/projects/gconf/) or the mailing list archives for more information (http://mail.gnome.org) about this problem.
J'ai regardé la FAQ d'Ekiga qui propose cela :
chmod -R 4755 /etc/gconf/gconf.xml.defaults/
(…)