unity-greeter crashed with SIGSEGV in background_loader_render()

[entonjackson]

Just booted the pc...
Not so easy to reproduce. Precise 64 bit

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-greeter 0.2.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-10.17-generic 3.2.1
Uname: Linux 3.2.0-10-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Mon Jan 23 08:47:30 2012
ExecutablePath: /usr/sbin/unity-greeter
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: /usr/sbin/unity-greeter
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x409222: mov 0x10(%rax),%edi
 PC (0x00409222) ok
 source "0x10(%rax)" (0xaaaaaaaaaaaaaaba) not located in a known VMA region (needed readable region)!
 destination "%edi" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-greeter
StacktraceTop:
 ?? ()
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
 clone () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
Title: unity-greeter crashed with SIGSEGV in start_thread()
UpgradeStatus: Upgraded to precise on 2012-01-20 (2 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 background_loader_render (self=0x1994b70) at background.c:539
 _background_loader_render_gthread_func (self=0x1994b70) at background.c:246
 g_thread_proxy (data=0x1994c00) at /build/buildd/glib2.0-2.31.10/./glib/gthread.c:801
 start_thread (arg=0x7f5358f4f700) at pthread_create.c:304
 clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112