Same problem, using Ubuntu 14.04 64bit:
unity-control-center
(unity-control-center:4387): Gtk-CRITICAL **: gtk_radio_button_set_group: assertion '!g_slist_find (group, radio_button)' failed
(unity-control-center:4387): unity-control-center-WARNING **: Could not load /usr/share/themes/Adwaita/index.theme: No such file or directory Segmentation fault
Same problem, using Ubuntu 14.04 64bit:
unity- control- center
(unity- control- center: 4387): Gtk-CRITICAL **: gtk_radio_ button_ set_group: assertion '!g_slist_find (group, radio_button)' failed
(unity- control- center: 4387): Gtk-CRITICAL **: gtk_radio_ button_ set_group: assertion '!g_slist_find (group, radio_button)' failed
(unity- control- center: 4387): Gtk-CRITICAL **: gtk_radio_ button_ set_group: assertion '!g_slist_find (group, radio_button)' failed
(unity- control- center: 4387): unity-control- center- WARNING **: Could not load /usr/share/ themes/ Adwaita/ index.theme: No such file or directory
Segmentation fault