Comment 13 for bug 444630

The patch is meant to be applied to the Ubuntu source package:

  apt-get source evolution-indicator
  cd evolution-indicator-0.2.14
  patch -p0 < /path/to/evolution-indicator-0.2.14-fix-notify-and-sound.diff

Then build the package:

  sudo apt-get build-dep evolution-indicator
  dpkg-buildpackage -rfakeroot

And install it:

  sudo dpkg -i ../evolution-indicator_0.2.14-0ubuntu4_amd64.deb