$ software-center
2012-09-07 18:45:04,349 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/dbus/proxies.py', 410, '_introspect_error_handler')'
2012-09-07 18:45:04,349 - dbus.proxies - ERROR - Introspect error on :1.128:/com/ubuntu/Softwarecenter: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
2012-09-07 18:45:29,406 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2012-09-07 18:45:29,409 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-09-07 18:45:29,822 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2012-09-07 18:45:29,973 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2012-09-07 18:45:29,991 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
Killed