gnome-appearance-properties crashed with SIGSEGV on every try to launch it

Binary package hint: gnome-control-center

if i run gnome-appearance-properties i get many of the following messages and after that gnome-appearance-properties dumps his core :(

(gnome-appearance-properties:8090): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

(gnome-appearance-properties:8090): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Sat Jul 7 14:30:20 2007
DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/bin/gnome-appearance-properties
NonfreeKernelModules: nvidia
Package: gnome-control-center 1:2.19.4-0ubuntu5
PackageArchitecture: i386
ProcCmdline: gnome-appearance-properties
ProcCwd: /home/jurp5
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: gnome-control-center
Stacktrace:
 #0 0xb68b3c00 in ?? () from /usr/lib/gtk-2.0/2.10.0/engines/libhcengine.so
 #1 0xb785d451 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
 #2 0xbfb6b778 in ?? ()
 #3 0x086ff5b0 in ?? ()
 #4 0x00000000 in ?? ()
StacktraceTop:
 ?? () from /usr/lib/gtk-2.0/2.10.0/engines/libhcengine.so
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 ?? ()
 ?? ()
 ?? ()
Title: gnome-appearance-properties crashed with SIGSEGV
Uname: Linux jurp5-desktop 2.6.22-7-generic #1 SMP Mon Jun 25 17:33:14 GMT 2007 i686 GNU/Linux
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