compiz crashed with SIGSEGV in g_type_check_instance_cast()

Compiz crashed, reason unknown. Could be a duplicate of one of the other bugs but they seem to relate to specific applications causing a crash.

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 i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Sun Oct 2 16:16:44 2011
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x73e18e <g_type_check_instance_cast+46>: mov (%edx),%eax
 PC (0x0073e18e) ok
 source "(%edx)" (0x67435941) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_type_check_instance_cast () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 BamfLauncherIcon::OnWindowMovedTimeout(BamfLauncherIcon*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in g_type_check_instance_cast()
UpgradeStatus: Upgraded to oneiric on 2011-09-28 (6 days ago)
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