Traceback (most recent call last):
  File "/usr/share/system-config-printer/applet.py", line 32, in <module>
    import cupshelpers.installdriver
  File "/usr/lib/pymodules/python2.7/cupshelpers/__init__.py", line 56, in <module>
    import ppds
  File "/usr/lib/pymodules/python2.7/cupshelpers/ppds.py", line 25, in <module>
    import xmldriverprefs
ValueError: bad marshal data (unknown type code)