Ubuntu Tweak crashes at startup 0.5.4-1 lucid

[Valter Rescic]

After the first installation it opened fine but the next time it crashed and even after the re-installation it reports the following error:

Traceback (most recent call last):
  File "/usr/bin/ubuntu-tweak", line 109, in <module>
    from ubuntutweak.mainwindow import MainWindow
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/mainwindow.py", line 142, in <module>
    MLOADER = ModuleLoader(modules.__path__[0])
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/__init__.py", line 27, in __init__
    package = __import__('.'.join([__name__, module]), fromlist=['modules'])
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/shortcuts.py", line 32, in <module>
    from compiz import CompizSetting
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 63, in <module>
    class CompizSetting:
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 64, in CompizSetting
    if module_check.has_ccm() and module_check.has_right_compiz():
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/common/systeminfo.py", line 77, in has_ccm
    import ccm
  File "/usr/lib/python2.6/dist-packages/ccm/__init__.py", line 1, in <module>
    from ccm.Conflicts import *
  File "/usr/lib/python2.6/dist-packages/ccm/Conflicts.py", line 27, in <module>
    from ccm.Constants import *
  File "/usr/lib/python2.6/dist-packages/ccm/Constants.py", line 88, in <module>
    locale.setlocale(locale.LC_ALL, "")
  File "/usr/lib/python2.6/locale.py", line 513, in setlocale
    return _setlocale(category, locale)
Error: unsupported locale setting