Hi, I've found where the problem was.... $ ldd /usr/lib/kde4/kopete_jabber.so | grep 'not found' libortp.so.5 => not found $ pacman -Q ortp ortp 0.14.0-1 $ pacman -Ql ortp | grep '\.so\.' ortp /usr/lib/libortp.so.7 ortp /usr/lib/libortp.so.7.0.0 $ pacman -Ss ortp testing/ortp 0.13.1-1 A Real-time Transport Protocol (RTP) library community/ortp 0.14.0-1 A Real-time Transport Protocol stack If I install ortp 0.13.1 it is now working. I guess this happened because, after I installed KDE 4.2 from [testing], I commented the [testing] repo in my /etc/pacman.conf. I guess pacman then updated ortp with the more recent version it found in [community]. The question here is.... Isn't [testing] supposed to be more up-to-date than the other repos ?! Cheers, Gilles.