polkitd crashed with SIGSEGV in dbus_message_iter_append_basic()

[userdce]

Binary package hint: policykit-1

i was install games from software-center. apport brings my to this bug....

ProblemType: Crash
Architecture: amd64
Date: Sun Feb 28 23:26:41 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/policykit-1/polkitd
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Package: policykit-1 0.96-1
ProcCmdline: /usr/lib/policykit-1/polkitd
ProcEnviron:

ProcVersionSignature: Ubuntu 2.6.32-14.20-generic
SegvAnalysis:
 Segfault happened at: 0x7fb3c7fc9e72: pcmpeqb (%rdi),%xmm2
 PC (0x7fb3c7fc9e72) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%xmm2" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: policykit-1
StacktraceTop:
 ?? () from /lib/libc.so.6
 ?? () from /lib/libdbus-1.so.3
 ?? () from /lib/libdbus-1.so.3
 dbus_message_iter_append_basic ()
 ?? () from /usr/lib/libeggdbus-1.so.0
Title: polkitd crashed with SIGSEGV in dbus_message_iter_append_basic()
Uname: Linux 2.6.32-14-generic x86_64
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #509651, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.