unity-greeter crashed with SIGSEGV in g_slice_alloc()

Always got the error when starting my session

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-greeter 0.0.8-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Sun Sep 18 20:50:12 2011
ExecutablePath: /usr/sbin/unity-greeter
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
ProcCmdline: unity-greeter
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7f6eeb10d215 <g_slice_alloc+293>: mov (%rbx),%rdx
 PC (0x7f6eeb10d215) ok
 source "(%rbx)" (0x000000f6) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-greeter
StacktraceTop:
 g_slice_alloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_slice_alloc0 () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 gtk_widget_set_parent () from /usr/lib/libgtk-3.so.0
Title: unity-greeter crashed with SIGSEGV in g_slice_alloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: