Did even more digging, and the plugin shared object for mail notification does depend on libcanberra so I suspect that my previous comment was incorrect. Also, I just changed the sound in the mail notification dialog box and it has started working again, so it might have been fixed with the upgrade to libcanberra.
Did even more digging, and the plugin shared object for mail notification does depend on libcanberra so I suspect that my previous comment was incorrect. Also, I just changed the sound in the mail notification dialog box and it has started working again, so it might have been fixed with the upgrade to libcanberra.