nautilus crashed with SIGSEGV in g_type_check_instance_cast()

i dont know

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: brasero 3.3.91-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-19.30-generic 3.2.11
Uname: Linux 3.2.0-19-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sun Mar 18 14:31:58 2012
ExecutablePath: /usr/bin/nautilus
ProcCmdline: nautilus -n
SegvAnalysis:
 Segfault happened at: 0x7f35606d1e9c <g_type_check_instance_cast+28>: mov (%rax),%rbp
 PC (0x7f35606d1e9c) ok
 source "(%rax)" (0x2c65337830202c39) not located in a known VMA region (needed readable region)!
 destination "%rbp" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: brasero
StacktraceTop:
 g_type_check_instance_cast (type_instance=0x294e000, iface_type=33580352) at /build/buildd/glib2.0-2.31.20/./gobject/gtype.c:3999
 ?? () from /usr/lib/x86_64-linux-gnu/libdbusmenu-gtk3.so.4
 g_closure_invoke (closure=0x2a98280, return_value=0x0, n_param_values=1, param_values=0x20dc480, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gclosure.c:777
 signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0x20dc480) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3547
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3295
Title: nautilus crashed with SIGSEGV in g_type_check_instance_cast()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo