Each time I launch a graphical application like gedit as a non-root user, I get this error :
(gedit:1376): Gtk-WARNING **: Unable to locate theme engine in module_path: “ubuntulooks”
To solve this problem, please install the following Debian package :
root@localhost:~# apt-get install gtk2-engines-ubuntulooks
Try to relaunch your graphical application :
foo@localhost:~$ gedit &
You will not get the initial error message anymore.