gnome-tweak not starting

radek@LPT-HP:~$ ubuntu-tweak
libcompizconfig: dlopen: /usr/lib/compizconfig/backends/libgconf.so: cannot open shared object file: No such file or directory
Backend     : ini
Integration : true
Profile     : default
Adding plugins
Initializing core options...done
[utils.icon][WARNING] Icon 'gconf-editor' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gconf-editor' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gnome-session-hibernate' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gnome-session-hibernate' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'application-octet-stream' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'application-octet-stream' not present in theme (icon.py:32)
[ModuleLoader][ERROR] Module import error: invalid literal for int() with base 10: '0.' (__init__.py:169)
[utils.icon][WARNING] Icon 'application-x-theme' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'application-x-theme' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'computerjanitor' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'computerjanitor' not present in theme (icon.py:32)
du: cannot access `/home/radek/.cache/thumbnails': No such file or directory
[utils.icon][WARNING] Icon 'gnome-session-hibernate' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gnome-session-hibernate' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'application-octet-stream' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'application-octet-stream' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gconf-editor' not present in theme (icon.py:32)
[utils.icon][WARNING] Icon 'gconf-editor' not present in theme (icon.py:32)
Traceback (most recent call last):
  File "/usr/bin/ubuntu-tweak", line 94, in on_startup
    self._window = UbuntuTweakWindow(feature=options.feature, module=options.module, splash_window=splash_window)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 297, in __init__
    clip_page = ClipPage()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/clips/__init__.py", line 128, in __init__
    self.setup_recently_used()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/clips/__init__.py", line 174, in setup_recently_used
    feature, module = ModuleLoader.search_module_for_name(name)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/__init__.py", line 116, in search_module_for_name
    module = cls._get_module_by_name_from_folder(name, m.__path__[0])
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/__init__.py", line 134, in _get_module_by_name_from_folder
    package = __import__(module_name)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/scripts.py", line 37, in <module>
    class AbstractScripts(object):
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/scripts.py", line 40, in AbstractScripts
    if int(platform.dist()[1][0:2]) >= 13:
ValueError: invalid literal for int() with base 10: '0.'
TypeError: can't convert return value to desired type
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_value_copy: assertion `G_IS_VALUE (src_value)' failed
  return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_value_reset: assertion `G_IS_VALUE (value)' failed
  return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_value_unset: assertion `G_IS_VALUE (value)' failed
  return info.invoke(*args, **kwargs)