g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

[dino99]

Binary package hint: gnome-power-manager

got these errors on every boot:

(gnome-power-manager:2425): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(gnome-power-manager:2425): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: gnome-power-manager 2.30.1-1ubuntu2
ProcVersionSignature: Ubuntu 2.6.35-10.15-generic-pae 2.6.35-rc5
Uname: Linux 2.6.35-10-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sun Jul 25 08:15:45 2010
ExecutablePath: /usr/bin/gnome-power-manager
GConfNonDefault:
 /apps/gnome-power-manager/lock/blank_screen=false
 /apps/gnome-power-manager/lock/use_screensaver_settings=false
 /apps/gnome-power-manager/notify/sleep_failed_uri=
 /apps/gnome-power-manager/ui/icon_policy=charge
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-10-generic-pae root=UUID=00c5de83-479c-4ab0-9b54-9af0a727175e ro quiet splash
ProcEnviron:
 LANG=fr_FR.utf8
 SHELL=/bin/bash
SourcePackage: gnome-power-manager
XsessionErrors: (polkit-gnome-authentication-agent-1:2449): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
dmi.bios.date: 10/22/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3001
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5W DH Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3001:bd10/22/2009:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5W DH Deluxe
dmi.product.version: System Version
dmi.sys.vendor: ASUSTEK COMPUTER INC

[dino99 (9d9)]

these errors are followed by the same ones but about: nautilus, gedit, gnome-panel, update-notifier, gnome terminal

and into the console opened to report bug: firefox.bin, and the process dont ended (wait for prompt but never happen)