Description: After a different user (with a different appearance settings) hase logged in (and after it logged out), with my user the theme was with ugly icons and menu backgrounds and unity panel.
Workaround:
killall gnome-settings-demon
gnome-settings-demon &
# after these two command the panel and the menu background was OK
killall nautilus
# after the automatic restart of nautilus the icon theme was OK
Same happened to me.
Description: After a different user (with a different appearance settings) hase logged in (and after it logged out), with my user the theme was with ugly icons and menu backgrounds and unity panel.
Workaround: demon demon &
killall gnome-settings-
gnome-settings-
# after these two command the panel and the menu background was OK
killall nautilus
# after the automatic restart of nautilus the icon theme was OK