This is still broken in 14.04. The workaround from point #4 fixes the issue for me:
pactl upload-sample /usr/share/sounds/ubuntu/stereo/bell.ogg bell.ogg
This is still broken in 14.04. The workaround from point #4 fixes the issue for me:
pactl upload-sample /usr/share/ sounds/ ubuntu/ stereo/ bell.ogg bell.ogg