mutter assert failure: Clutter:ERROR:./clutter-actor.c:628:clutter_actor_set_mapped: assertion failed: (CLUTTER_ACTOR_IS_MAPPED (self))

[Eyad Salah]

Binary package hint: mutter

I have no idea what caused this problem it just came out of nowhere

ProblemType: Crash
Architecture: amd64
AssertionMessage: Clutter:ERROR:./clutter-actor.c:628:clutter_actor_set_mapped: assertion failed: (CLUTTER_ACTOR_IS_MAPPED (self))
CheckboxSubmission: f1b15b20a09c88034055ebde1ac7d6a2
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Tue Feb 2 08:50:31 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/mutter
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: nvidia
Package: mutter 2.28.1~git20091208-1ubuntu4
ProcCmdline: mutter --mutter-plugins=libgnome-shell --replace
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-12.16-generic
Signal: 6
SourcePackage: mutter
StacktraceTop:
 raise () from /lib/libc.so.6
 abort () from /lib/libc.so.6
 g_assertion_message () from /lib/libglib-2.0.so.0
 g_assertion_message_expr ()
 ?? () from /usr/lib/libclutter-glx-1.0.so.0
Title: mutter assert failure: Clutter:ERROR:./clutter-actor.c:628:clutter_actor_set_mapped: assertion failed: (CLUTTER_ACTOR_IS_MAPPED (self))
Uname: Linux 2.6.32-12-generic x86_64
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 #515326, 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.