polkitd crashed with SIGSEGV in dbus_message_iter_append_basic()

[ERE]

Binary package hint: policykit-1

polkitd crashed with SIGSEGV in dbus_message_iter_append_basic()

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: policykit-1 0.96-2
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Thu May 27 12:06:23 2010
ExecutablePath: /usr/lib/policykit-1/polkitd
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcCmdline: /usr/lib/policykit-1/polkitd
ProcEnviron:

SegvAnalysis:
 Segfault happened at: 0xa1c7a0: pcmpeqb (%esi),%xmm0
 PC (0x00a1c7a0) ok
 source "(%esi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%xmm0" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: policykit-1
StacktraceTop:
 ?? () from /lib/tls/i686/cmov/libc.so.6
 ?? () from /lib/libdbus-1.so.3
 ?? () from /lib/libdbus-1.so.3
 dbus_message_iter_append_basic () from /lib/libdbus-1.so.3
 ?? () from /usr/lib/libeggdbus-1.so.0
Title: polkitd crashed with SIGSEGV in dbus_message_iter_append_basic()
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 ?? () from /lib/tls/i686/cmov/libc.so.6
 _dbus_marshal_write_basic (str=0x94a84c0, insert_at=54,
 _dbus_type_writer_write_basic (writer=0xbf8cd200, type=115,
 dbus_message_iter_append_basic (iter=0xbf8cd1f8, type=115,
 egg_dbus_append_value_to_iter (iter=<value optimized out>,