vincenzo@ubuntu:~$ sudo gnome-app-install
Password:
Traceback (most recent call last):
  File "/usr/bin/gnome-app-install", line 22, in ?
    import gtk, gtk.glade
  File "/usr/lib/python2.4/site-packages/gtk-2.0/gtk/__init__.py", line 37, in ?    from _gtk import *
ImportError: /usr/lib/libcairo.so.2: undefined symbol: FT_GlyphSlot_Embolden
vincenzo@ubuntu:~$