Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/view/appview.py", line 241, in on_get_value
    doc = self.db.get_xapian_document(app.appname, app.pkgname)
  File "/usr/share/software-center/softwarecenter/db/database.py", line 192, in get_xapian_document
    for m in self.xapiandb.postlist("AA"+appname):
  File "/usr/lib/python2.6/dist-packages/xapian.py", line 5248, in _database_gen_postlist_iter
    return PostingIter(self.postlist_begin(tname), self.postlist_end(tname),
DatabaseModifiedError: The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation