apport-gtk crashed with SIGSEGV in g_variant_unref()

[Wildjiji]

Sometimes, Apport is crashed at login.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: apport-gtk 1.22.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic-pae 3.0.4
Uname: Linux 3.0.0-10-generic-pae i686
Architecture: i386
CrashCounter: 1
Date: Wed Sep 7 19:31:58 2011
ExecutablePath: /usr/share/apport/apport-gtk
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110717)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/apport/apport-gtk
ProcEnviron:
 PATH=(custom, user)
 LANG=ja_JP.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb6ef54f3 <g_variant_unref+35>: lock xadd %eax,0x14(%esi)
 PC (0xb6ef54f3) ok
 source "%eax" ok
 destination "0x14(%esi)" (0x00000014) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: apport
StacktraceTop:
 g_variant_unref () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_settings_get_boolean () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 gtk_module_init (argc=-1231042664, argv=0xb69fc794) at module.c:32
 ?? () from /usr/lib/libgtk-3.so.0
 g_cclosure_marshal_VOID__PARAM () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: apport-gtk crashed with SIGSEGV in g_variant_unref()
UpgradeStatus: Upgraded to oneiric on 2011-08-26 (14 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 g_variant_unref (value=0x0) at /build/buildd/glib2.0-2.29.90/./glib/gvariant-core.c:617
 g_settings_get_boolean (settings=0x948d9b8, key=0xb5f5de20 <Address 0xb5f5de20 out of bounds>) at /build/buildd/glib2.0-2.29.90/./gio/gsettings.c:1988
 ?? ()
 ?? ()