metacity crashed with SIGABRT in __kernel_vsyscall()

[dc]

Metacity crashed right after login on VirtualBox:

StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 meta_bug (format=0x80b0c60 "Unexpected X error: %s serial %ld error_code %d request_code %d minor_code %d)\n") at core/util.c:398
 x_error_handler (error=0xbfe6871c, xdisplay=0x97f2200) at core/errors.c:247

-----

 Thread 1 (Thread 0xb7892870 (LWP 1767)):
 #0 0x00865416 in __kernel_vsyscall ()
 No symbol table info available.
 #1 0x01019c8f in raise () from /lib/i386-linux-gnu/libc.so.6
 No symbol table info available.
 #2 0x0101d2b5 in abort () from /lib/i386-linux-gnu/libc.so.6
 No symbol table info available.
 #3 0x0807daab in meta_bug (format=0x80b0c60 "Unexpected X error: %s serial %ld error_code %d request_code %d minor_code %d)\n") at core/util.c:398
         args = 0xbfe68654 "|\206\346\277\321\003"
         str = 0x98576d0 "\240T\026\001\240T\026\001ed X error: BadWindow (invalid Window parameter) serial 977 error_code 3 request_code 19 minor_code 0)\n"
         out = 0x1164460
         __PRETTY_FUNCTION__ = "meta_bug"
 #4 0x0806989c in x_error_handler (error=0xbfe6871c, xdisplay=0x97f2200) at core/errors.c:247
         retval = <optimized out>
         buf = "BadWindow (invalid Window parameter)", '\000' <repeats 27 times>
         display = 0x986e5a8
 #5 x_error_handler (xdisplay=0x97f2200, error=0xbfe6871c) at core/errors.c:203
         retval = 0
         foreign = <optimized out>
 #6 0x00badd3b in _XError () from /usr/lib/i386-linux-gnu/libX11.so.6
 No symbol table info available.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: metacity 1:2.34.1-1ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
CrashCounter: 1
Date: Fri Sep 16 23:12:58 2011
ExecutablePath: /usr/bin/metacity
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
ProcCmdline: metacity
ProcCwd: /var/lib/gdm
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/false
 PATH=(custom, no user)
Signal: 6
SourcePackage: metacity
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 meta_bug (format=0x80b0c60 "Unexpected X error: %s serial %ld error_code %d request_code %d minor_code %d)\n") at core/util.c:398
 x_error_handler (error=0xbfe6871c, xdisplay=0x97f2200) at core/errors.c:247
Title: metacity crashed with SIGABRT in __kernel_vsyscall()
UpgradeStatus: Upgraded to oneiric on 2011-08-30 (17 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 #848808, 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.