I previously filed bug 876941

Attached is my file from /var/lib/apt-xapian-index/. After deleting it however I see no change. SW Center still does not load

And in Terminal:

2011-12-07 18:49:59,996 - softwarecenter.ui.gtk3.em - INFO - EM's: 17 15 21
2011-12-07 18:50:01,014 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2011-12-07 18:50:01,156 - softwarecenter.ui.gtk3.utils - INFO - Softwarecenter style provider for ambiance Gtk theme: /usr/share/software-center/ui/gtk3/css/softwarecenter.css
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1193, in show_lobby
    self.view_manager.set_active_view(ViewPages.AVAILABLE)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 125, in set_active_view
    view_widget.init_view()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 109, in init_view
    SoftwarePane.init_view(self)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 261, in init_view
    self.icons, self.show_ratings)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appview.py", line 76, in __init__
    self.helper = AppPropertiesHelper(db, cache, icons)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/models/appstore2.py", line 228, in __init__
    softwarecenter.paths.APP_INSTALL_PATH)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 111, in parse_applications_menu
    category = self._parse_menu_tag(child)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 271, in _parse_menu_tag
    query = self._parse_include_tag(element)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 230, in _parse_include_tag
    return self._parse_and_or_not_tag(include, query, xapian.Query.OP_AND)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 177, in _parse_and_or_not_tag
    or_elem = self._parse_and_or_not_tag(and_elem, xapian.Query(), xapian.Query.OP_OR)
  File "/usr/share/software-center/softwarecenter/db/categories.py", line 217, in _parse_and_or_not_tag
    q = self.db.xapian_parser.parse_query(s, xapian.QueryParser.FLAG_WILDCARD)
  File "/usr/share/software-center/softwarecenter/db/database.py", line 151, in xapian_parser
    self._parser_per_thread[thread_name] = self._get_new_xapian_parser()
  File "/usr/share/software-center/softwarecenter/db/database.py", line 175, in _get_new_xapian_parser
    xapian_parser.set_database(self.xapiandb)
  File "/usr/share/software-center/softwarecenter/db/database.py", line 143, in xapiandb
    self._db_per_thread[thread_name] = self._get_new_xapiandb()
  File "/usr/share/software-center/softwarecenter/db/database.py", line 155, in _get_new_xapiandb
    xapiandb = xapian.Database(self._db_pathname)
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 3408, in __init__
    _xapian.Database_swiginit(self,_xapian.new_Database(*args))
xapian.DatabaseOpeningError: Couldn't stat '/var/cache/software-center/xapian' (Adresář nebo soubor neexistuje)
2011-12-07 18:50:06,385 - softwarecenter.ui.gtk3.app - INFO - software-center-agent finished with status 0
Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/backend/channel_impl/aptchannels.py", line 157, in _check_for_channel_updates_timer
    if self._check_for_channel_updates():
  File "/usr/share/software-center/softwarecenter/backend/channel_impl/aptchannels.py", line 174, in _check_for_channel_updates
    db_origins = set(self.db.get_origins_from_db())
  File "/usr/share/software-center/softwarecenter/db/database.py", line 484, in get_origins_from_db
    for term in self.xapiandb.allterms("XOO"):
  File "/usr/share/software-center/softwarecenter/db/database.py", line 143, in xapiandb
    self._db_per_thread[thread_name] = self._get_new_xapiandb()
  File "/usr/share/software-center/softwarecenter/db/database.py", line 155, in _get_new_xapiandb
    xapiandb = xapian.Database(self._db_pathname)
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 3408, in __init__
    _xapian.Database_swiginit(self,_xapian.new_Database(*args))
xapian.DatabaseOpeningError: Couldn't stat '/var/cache/software-center/xapian' (Adresář nebo soubor neexistuje)