software-center crash with 12.10 DatabaseOpeningError: Couldn't detect type of database

hi community,
I am a rookie concerning ubuntu, so please have it in mind when you hopefully support me. I have just installed version 12.10, no upgrade or something else, brand new installation from a DVD. I cannot start software-center. The window pops up, but just for a seconde, then it is been closed automatically. I started the programm via console, please have a look at the log messages. Does anybody ḱnow how to solve that issue?

tbrunsfe@ubuntu:~$ software-center
Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/69-language-selector-ja-jp.conf", line 141: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/69-language-selector-zh-tw.conf", line 79: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 9: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 26: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 31: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 40: Having multiple values in <test> isn't supported and may not works as expected
2012-08-30 13:29:29,931 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2012-08-30 13:29:29,952 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-08-30 13:29:30,102 - softwarecenter.ui.gtk3.app - INFO - building local database
2012-08-30 13:29:30,102 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
2012-08-30 13:29:32,640 - softwarecenter.db.update - WARNING - Problem creating rebuild path '/var/cache/software-center/xapian_rb'.
2012-08-30 13:29:32,640 - softwarecenter.db.update - WARNING - Please check you have the relevant permissions.
2012-08-30 13:29:32,641 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:34:20: Not using units is deprecated. Assuming 'px'.

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:34:22: Not using units is deprecated. Assuming 'px'.

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:56:20: Not using units is deprecated. Assuming 'px'.

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:56:22: Not using units is deprecated. Assuming 'px'.

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:60:20: Not using units is deprecated. Assuming 'px'.

(software-center:2629): Gtk-WARNING **: Theme parsing error: softwarecenter.css:60:22: Not using units is deprecated. Assuming 'px'.
2012-08-30 13:29:32,713 - softwarecenter.region - WARNING - failed to use geoclue: 'org.freedesktop.Geoclue.Error.notAvailable: Geoclue master client has no usable Address providers'
2012-08-30 13:29:32,943 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2012-08-30 13:29:32,956 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')'
2012-08-30 13:29:32,956 - root - ERROR - Could not find any typelib for LaunchpadIntegration
2012-08-30 13:29:33,075 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2012-08-30 13:29:33,078 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
Traceback (most recent call last):
  File "/usr/bin/software-center", line 184, in <module>
    app.run(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1416, in run
    self.show_available_packages(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1354, in show_available_packages
    self.view_manager.set_active_view(ViewPages.AVAILABLE)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 151, in set_active_view
    view_widget.init_view()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 142, in init_view
    SoftwarePane.init_view(self)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 140, in init_view
    self.icons, self.show_ratings)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appview.py", line 70, in __init__
    self.helper = AppPropertiesHelper(db, cache, icons)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/models/appstore2.py", line 110, in __init__
    softwarecenter.paths.APP_INSTALL_PATH)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 271, in parse_applications_menu
    category = self._parse_menu_tag(child)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 465, in _parse_menu_tag
    query = self._parse_include_tag(element)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 423, in _parse_include_tag
    xapian.Query.OP_AND)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 360, in _parse_and_or_not_tag
    operator_elem, xapian.Query(), xapian.Query.OP_OR)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 406, in _parse_and_or_not_tag
    q = self.db.xapian_parser.parse_query(s,
  File "/usr/share/software-center/softwarecenter/db/database.py", line 174, in xapian_parser
    xapian_parser = self._get_new_xapian_parser()
  File "/usr/share/software-center/softwarecenter/db/database.py", line 200, in _get_new_xapian_parser
    xapian_parser.set_database(self.xapiandb)
  File "/usr/share/software-center/softwarecenter/db/database.py", line 166, in xapiandb
    self._db_per_thread[thread_name] = self._get_new_xapiandb()
  File "/usr/share/software-center/softwarecenter/db/database.py", line 179, in _get_new_xapiandb
    xapiandb = xapian.Database(self._db_pathname)
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 3666, in __init__
    _xapian.Database_swiginit(self,_xapian.new_Database(*args))
xapian.DatabaseOpeningError: Couldn't detect type of database
tbrunsfe@ubuntu:~$