software center ubuntu 12 10 no instala programas.

Al trabajar en consola con software-center informa:
petrus@petrus-HP-Pavilion-dv4-Notebook-PC:~$ software-center
2012-10-28 07:12:13,369 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2012-10-28 07:12:13,381 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-10-28 07:12:13,967 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2012-10-28 07:12:13,977 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')'
2012-10-28 07:12:13,976 - root - ERROR - Could not find any typelib for LaunchpadIntegration
2012-10-28 07:12:14,304 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2012-10-28 07:12:14,317 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()