o software-center não inicia: cairo e / ou libgdk-3 problema?

Question

Estou executando o Ubuntu 14.04.5. e eu não consigo mais abrir o gui do Ubuntu Software Center, seja do launcher ou do terminal. Quando eu digito software-center na linha de comando, a mensagem retornada é: /usr/bin/python: symbol lookup error: /usr/lib/x86_64-linux-gnu/libgdk-3.so.0: undefined symbol: cairo_surface_set_device_scale . Já executei apt-get update e apt-get upgrade , sem efeito perceptível. Qualquer conselho seria muito apreciado!

EDIT 1: Observe que sudo software-center encontra o mesmo problema.

EDIT 2: A atualização para o Ubuntu 16.04 parece corrigir, pelo menos parcialmente, o problema: agora posso executar o Software Center a partir do launcher. Curiosamente, ainda não consigo iniciá-lo na linha de comando. Isso faz com que o rastreamento de erro:

box:~> software-center
ERROR:root:DebFileApplication import
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/db/__init__.py", line 6, in <module>
    from .debfile import DebFileApplication, DebFileOpenError
  File "/usr/share/software-center/softwarecenter/db/debfile.py", line 25, in <module>
    from softwarecenter.db.application import Application, AppDetails
  File "/usr/share/software-center/softwarecenter/db/application.py", line 26, in <module>
    import xapian
  File "/home/ianc/anaconda2/lib/python2.7/site-packages/xapian/__init__.py", line 43, in <module>
    _xapian = swig_import_helper()
  File "/home/ianc/anaconda2/lib/python2.7/site-packages/xapian/__init__.py", line 39, in swig_import_helper
    _mod = imp.load_module('_xapian', fp, pathname, description)
ImportError: /home/ianc/anaconda2/lib/python2.7/site-packages/xapian/_xapian.so: undefined symbol: _ZN6Xapian5ErrorC2ERKSsS2_PKcS4_
Traceback (most recent call last):
  File "/usr/bin/software-center", line 128, in <module>
    from softwarecenter.ui.gtk3.app import SoftwareCenterAppGtk3
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 38, in <module>
    import xapian
  File "/home/ianc/anaconda2/lib/python2.7/site-packages/xapian/__init__.py", line 43, in <module>
    _xapian = swig_import_helper()
  File "/home/ianc/anaconda2/lib/python2.7/site-packages/xapian/__init__.py", line 39, in swig_import_helper
    _mod = imp.load_module('_xapian', fp, pathname, description)
ImportError: /home/ianc/anaconda2/lib/python2.7/site-packages/xapian/_xapian.so: undefined symbol: _ZN6Xapian5ErrorC2ERKSsS2_PKcS4_