Comment 3 for bug 514943

Does this still happen in lucid? I have a feeling it is the same "compiz doesn't use libcanberra, pulseaudio doesn't reroute Xorg PC speaker beeps to it's own sound" problem as bug 301174. If so the pulseaudio side was fixed which makes up for compiz not supporting this DE-specific library in its core code (probably never going to happen).