polkit-gnome-authentication-agent-1 crashed with SIGSEGV in g_datalist_id_set_data_full()

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ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: policykit-1-gnome 0.99-1ubuntu3
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
Architecture: i386
CrashCounter: 1
Date: Fri Jan 28 15:16:33 2011
ExecutablePath: /usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcCmdline: /usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 LC_MESSAGES=en_US.utf8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x2f7ec8 <g_datalist_id_set_data_full+744>: cmp 0x4(%eax),%edi
 PC (0x002f7ec8) ok
 source "0x4(%eax)" (0x0000001c) not located in a known VMA region (needed readable region)!
 destination "%edi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: policykit-1-gnome
StacktraceTop:
 g_datalist_id_set_data_full () from /lib/libglib-2.0.so.0
 g_object_unref () from /usr/lib/libgobject-2.0.so.0
 ?? ()
 __libc_start_main () from /lib/libc.so.6
 ?? ()
Title: polkit-gnome-authentication-agent-1 crashed with SIGSEGV in g_datalist_id_set_data_full()
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:1183): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (gnome-appearance-properties:1315): Gtk-CRITICAL **: gtk_tree_model_sort_real_unref_node: assertion `elt->ref_count > 0' failed