sudo apt-get install libcanberra-gtk-module:i386 gtk2-engines-murrine:i386
^^ It works for me too.
Ubuntu 13.10 x86_64, Skype 4.2.0.11
sudo apt-get install libcanberra- gtk-module: i386 gtk2-engines- murrine: i386
^^ It works for me too.
Ubuntu 13.10 x86_64, Skype 4.2.0.11