If you get this message “(WW) The directory “/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType” does not exist” in your Xorg log file, install the following package :
root@localhost:~#apt-get install x-ttcidfont-conf
Restart your X server and this message will disappear from your logs.
thanks and regards from argentina brother! i am using kde on debian testing and i have problems with the buttons using nvidia driver.