compiz crashed with SIGSEGV in g_type_check_instance_cast()

[Mauricio Pretto]

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ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.20.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl fglrx
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sat Oct 1 18:12:35 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110919)
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x7f101a11b54c <g_type_check_instance_cast+28>: mov (%rax),%rbp
 PC (0x7f101a11b54c) ok
 source "(%rax)" (0xc000000000000000) not located in a known VMA region (needed readable region)!
 destination "%rbp" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_type_check_instance_cast () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 BamfLauncherIcon::OnWindowMovedTimeout(BamfLauncherIcon*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in g_type_check_instance_cast()
UpgradeStatus: Upgraded to oneiric on 2011-09-26 (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 #862972, 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.