Crash on startup

[wieczorek1990]

/usr/local/lib/python2.7/dist-packages/ubuntu_tweak-0.8.8-py2.7.egg/EGG-INFO/scripts/ubuntu-tweak:33: PyGIDeprecationWarning: Since version 3.11, calling threads_init is no longer needed. See: https://wiki.gnome.org/PyGObject/Threading
  GObject.threads_init()
[Launcher][DEBUG] Distribution: Ubuntu 14.10 utopic
Application: Ubuntu Tweak
Desktop:gnome (ubuntu-tweak:84)
Attempt to unlock mutex that was not locked
Przerwane (core dumped)