Comment 4 for bug 827382

None of the plugins can be activated, when clicked there appears a red symbol and...

Traceback (most recent call last):
  File "/usr/lib/totem/plugins/opensubtitles/opensubtitles.py", line 298, in <module>
    class OpenSubtitles(gobject.GObject, Peas.Activatable):
TypeError: Error when calling the metaclass bases
    metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

(totem:11098): libpeas-WARNING **: Error loading plugin 'opensubtitles'
Traceback (most recent call last):
  File "/usr/lib/totem/plugins/pythonconsole/pythonconsole.py", line 69, in <module>
    class PythonConsolePlugin(gobject.GObject, Peas.Activatable):
TypeError: Error when calling the metaclass bases
    metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

(totem:11098): libpeas-WARNING **: Error loading plugin 'pythonconsole'