gnome-power-manager crashed with SIGSEGV in fclose()

Binary package hint: gnome-power-manager

this appeared in apport after switching from the guest login session back to my normal user login session

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: gnome-power-manager 2.32.0-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat May 21 12:29:24 2011
ExecutablePath: /usr/bin/gnome-power-manager
GnomeSessionIdleInhibited: Unknown
GnomeSessionInhibitors: Failed to acquire
GnomeSessionSuspendInhibited: Unknown
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Dell Inc. Inspiron 1520
ProcCmdline: gnome-power-manager
ProcEnviron:
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=9aae889a-ecb6-4d62-9cef-ba4f962d6254 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f5d608fb0e4 <fclose+4>: mov (%rdi),%ecx
 PC (0x7f5d608fb0e4) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-power-manager
StacktraceTop:
 fclose () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
 g_type_create_instance () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_newv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-power-manager crashed with SIGSEGV in fclose()
UpgradeStatus: Upgraded to natty on 2011-05-09 (11 days ago)
UserGroups:

dmi.bios.date: 07/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0KY768
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/11/2008:svnDellInc.:pnInspiron1520:pvr:rvnDellInc.:rn0KY768:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1520
dmi.sys.vendor: Dell Inc.