Traceback (most recent call last):
  File "/usr/sbin/update-app-install", line 3, in <module>
    from AppInstall.update import main
  File "/usr/lib/python2.5/site-packages/AppInstall/update.py", line 10, in <module>
    import xdg.DesktopEntry
ImportError: No module named xdg.DesktopEntry