Ubuntu - No application bars

After performing a system cleanup with the "janitor"and installing a theme manager "Art manager" the application simply disappear (the one with the minimise restore and maximise buttons).

The solution for it was installing/reinstalling some packages from synaptic :
  • search using "Windows manager"
  • select:
    • metacity - A lightweight GTK2 based Window Manager
    • libmetacity0 - library of lightweight GTK2 based Window Manager
    • metacity-common - Shared files of lightweight GTK2 based Window Manager
  • select "Mark for re-installation"

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