Comment 4 for bug 63092

I saw this as well during my most recent upgrade, which was:

The following NEW packages will be installed:
  x11proto-print-dev
The following packages will be upgraded:
  bsh console-setup deskbar-applet dpkg dpkg-dev dselect
  edgy-community-wallpapers epiphany-browser firefox firefox-dbg
  firefox-gnome-support gaim gaim-data gaim-dbg gnome-screensaver gthumb
  initramfs-tools irssi irssi-text libdb4.4 libgd2-xpm libgd2-xpm-dev
  libmono-cairo1.0-cil libmono-corlib1.0-cil libmono-data-tds1.0-cil
  libmono-peapi1.0-cil libmono-relaxng1.0-cil libmono-security1.0-cil
  libmono-sharpzip0.84-cil libmono-sqlite1.0-cil libmono-system-data1.0-cil
  libmono-system-runtime1.0-cil libmono-system-web1.0-cil
  libmono-system1.0-cil libmono0 libmono1.0-cil libnautilus-extension1
  libnspr-dev libnspr4 libnss-dev libnss3 libxp-dev libxp6
  linux-restricted-modules-2.6.17-10-generic linux-restricted-modules-common
  mono-common mono-gac mono-jit mono-mcs mono-runtime mono-utils nautilus
  nautilus-data nvidia-kernel-common python-central python-glade2
  python-gobject python-gtk2 rhythmbox startup-tasks system-services upstart
  upstart-compat-sysv upstart-logd xchat-gnome xchat-gnome-common

The only new notification I see is the one from firefox.