Parameter 3 to Unity.Notification.showNotification() does not appear to be optional

Hmm, apport-collect didn't help me out here, so providing what I think might be relevant:

fader@baltar:~$ dpkg-query -s firefox
Package: firefox
Status: install ok installed
Priority: optional
Section: web
Installed-Size: 48069
Maintainer: Ubuntu Mozilla Team <email address hidden>
Architecture: amd64
Version: 17.0.1+build1-0ubuntu0.12.10.1
Replaces: kubuntu-firefox-installer
Provides: gnome-www-browser, iceweasel, www-browser
Depends: lsb-release, libasound2 (>= 1.0.16), libatk1.0-0 (>= 1.12.4), libc6 (>= 2.15), libcairo2 (>= 1.2.4), libdbus-1-3 (>= 1.0.2), libdbus-glib-1-2 (>= 0.78), libfontconfig1 (>= 2.9.0), libfreetype6 (>= 2.3.9), libgcc1 (>= 1:4.1.1), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.31.8), libgtk2.0-0 (>= 2.24.0), libpango1.0-0 (>= 1.14.0), libstartup-notification0 (>= 0.8), libstdc++6 (>= 4.6), libx11-6, libxext6, libxrender1, libxt6
Recommends: xul-ext-ubufox, firefox-globalmenu, libcanberra0
Suggests: latex-xft-fonts, libthai0, firefox-gnome-support
Conffiles:
 /etc/apparmor.d/usr.bin.firefox 1e9622ff54b66ff14df4cbd6987599d9
 /etc/apport/native-origins.d/firefox 7c26b75c7c2b715c89cc6d85338252a4
 /etc/apport/blacklist.d/firefox ee63264f847e671832d42255912ce144
 /etc/firefox/syspref.js 09e457e65435a1a043521f2bd19cd2a1
Description: Safe and easy web browser from Mozilla
 Firefox delivers safe, easy web browsing. A familiar user interface,
 enhanced security features including protection from online identity theft,
 and integrated search let you get the most out of the web.
Xul-Appid: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}

fader@baltar:~$ dpkg-query -s unity-webapps-common
Package: unity-webapps-common
Status: install ok installed
Priority: optional
Section: gnome
Installed-Size: 308
Maintainer: Ubuntu Developers <email address hidden>
Architecture: all
Source: webapps-applications
Version: 2.4.10-0ubuntu1
Replaces: unity-webapps
Depends: session-migration, unity-webapps-service (>= 2.3.8-0ubuntu3), xdg-utils
Suggests: xul-ext-unity (>= 0.3.1) | unity-chromium-extension
Breaks: unity-webapps
Conffiles:
 /etc/aptdaemon/high-trust-repository-whitelist.d/aptdaemon-trust-webapps.cfg 2dd13bd04292ada586c9a4fce1e35120
Description: Unity WebApp integration scripts
 Example scripts for WebApp integration with the Unity desktop
Homepage: https://launchpad.net/webapps-applications

fader@baltar:~$ dpkg-query -s unity
Package: unity
Status: install ok installed
Priority: optional
Section: gnome
Installed-Size: 4540
Maintainer: Ubuntu Developers <email address hidden>
Architecture: amd64
Version: 6.10.0-0ubuntu2
Provides: indicator-renderer
Depends: compiz-core, libatk-bridge2.0-0 (>= 2.5.3), libatk1.0-0 (>= 2.2.0), libbamf3-0 (>= 0.3.0), libc6 (>= 2.14), libcairo2 (>= 1.2.4), libdbusmenu-glib4 (>= 0.4.2), libdee-1.0-4 (>= 0.5.12), libgcc1 (>= 1:4.1.1), libgdk-pixbuf2.0-0 (>= 2.22.0), libgl1-mesa-glx | libgl1, libglew1.8 (>= 1.8.0), libglib2.0-0 (>= 2.33.14), libgtk-3-0 (>= 3.1.6), libindicator3-7, libjson-glib-1.0-0 (>= 0.12.0), libnotify4 (>= 0.7.0), libnux-3.0-0, libpango1.0-0 (>= 1.22.0), libsigc++-2.0-0c2a (>= 2.0.2), libstartup-notification0 (>= 0.2), libstdc++6 (>= 4.6...