zeitgeist-daemon crashed with DocNotFoundError in _check_index_and_start_worker(): Document 4 not found

[hazem hegazi]

at system startup
i just restarted the system after applying the latest update, and also I got this error before applying the update when I started the system ran the update software and asked it to check for updates, I guess that I got an error

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: zeitgeist-core 0.8.1.1-1
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
Architecture: amd64
Date: Tue Sep 6 03:49:35 2011
ExecutablePath: /usr/bin/zeitgeist-daemon
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110802.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/zeitgeist-daemon
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/zeitgeist-daemon']
SourcePackage: zeitgeist
Title: zeitgeist-daemon crashed with DocNotFoundError in _check_index_and_start_worker(): Document 4 not found
Traceback:
 Traceback (most recent call last):
   File "/usr/share/zeitgeist/_zeitgeist/engine/extensions/fts.py", line 282, in _check_index_and_start_worker
     hits = self._enquire.get_mset (0, 1)
 DocNotFoundError: Document 4 not found
UpgradeStatus: Upgraded to oneiric on 2011-08-31 (5 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #841922, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.