Comment 2 for bug 954344

Occurs each time
I must use comnd line
sudo apt-get update
sudo apt-get upgrade
Les paquets suivants seront mis à jour :
  cpp-4.4 gcc-4.4 gcc-4.4-base python-gobject-2 python-pyatspi2
  python-software-properties software-properties-common
  software-properties-gtk usb-creator-common usb-creator-gtk

But it is the same update-manager is broken