cupsd crashed with SIGSEGV in _dbus_header_get_byte_order()

This was reported when I reacted on update message to install upgrades. If this was coincidental, I don't know.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: cups 1.6.1-0ubuntu11.3
ProcVersionSignature: Ubuntu 3.5.0-20.31-generic 3.5.7.1
Uname: Linux 3.5.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
CupsErrorLog:
 E [12/Dec/2012:18:27:38 +0100] Unknown directive SystemGroup on line 16 of /etc/cups/cupsd.conf.
 E [12/Dec/2012:18:57:03 +0100] Unknown directive SystemGroup on line 16 of /etc/cups/cupsd.conf.
Date: Wed Dec 12 18:57:03 2012
ExecutablePath: /usr/sbin/cupsd
InstallationDate: Installed on 2010-10-14 (789 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
Lpstat:
 device for hplaser@ws1: ipp://192.168.5.201:631/printers/hplaser
 device for lexmark@ws1: ipp://192.168.5.201:631/printers/lexmark
Lsusb:
 Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
 Bus 002 Device 002: ID 046d:c018 Logitech, Inc. Optical Wheel Mouse
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 004: ID 056d:0002 EIZO Corp. HID Monitor Controls
MachineType: MSI MS-7366
MarkForUpload: True
Papersize: a4
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: BOOT_IMAGE=/vmlinuz-3.5.0-20-generic root=UUID=680229a7-f19e-4afc-a959-88e7c07ebdc9 ro quiet splash
ProcEnviron:
 PATH=(custom, no user)
 TERM=linux
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-20-generic root=UUID=680229a7-f19e-4afc-a959-88e7c07ebdc9 ro quiet splash
SegvAnalysis:
 Segfault happened at: 0x7fe51a1577a3: movzbl (%rax),%eax
 PC (0x7fe51a1577a3) ok
 source "(%rax)" (0x000000be) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: cups
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
 ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
 dbus_message_get_reply_serial () from /lib/x86_64-linux-gnu/libdbus-1.so.3
 ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
 ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
Title: cupsd crashed with SIGSEGV in dbus_message_get_reply_serial()
UpgradeStatus: Upgraded to quantal on 2012-10-06 (67 days ago)
UserGroups:

dmi.bios.date: 07/08/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.3
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: MS-7366
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.3:bd07/08/2008:svnMSI:pnMS-7366:pvr1.0:rvnMSI:rnMS-7366:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: MS-7366
dmi.product.version: 1.0
dmi.sys.vendor: MSI
mtime.conffile..etc.cups.cupsd.conf: 2012-10-20T16:36:26.698540