metacity crashed with SIGABRT in raise() while loading theme

[nelis111]

metacity crashes when loading or changing theme:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gtweak/tweaks/tweak_windows.py", line 72, in _on_combo_changed
    self.gconf.set_value(value)
  File "/usr/lib/python2.7/dist-packages/gtweak/gconf.py", line 73, in set_value
    self._client.set_string(self._key, value)
  File "/usr/lib/python2.7/dist-packages/gi/types.py", line 44, in function
    return info.invoke(*args)
glib.GError: Configuration server couldn't be contacted: D-BUS error: Method "Set" with signature "s(is)" on interface "org.gnome.GConf.Database" doesn't exist

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: metacity 1:2.34.1-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Aug 30 12:47:49 2011
ExecutablePath: /usr/bin/metacity
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: metacity
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/false
 PATH=(custom, no user)
Signal: 6
SourcePackage: metacity
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
 ?? ()
 _XError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
Title: metacity crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to oneiric on 2011-08-14 (16 days ago)
UserGroups:

[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 #827452, 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.