cupsd crashed with SIGSEGV in _dbus_header_get_byte_order()

no idea what triggered this, the crash report was waiting for me when I logged in in the morning.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: cups 1.6.1-0ubuntu11
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Mon Nov 5 08:31:45 2012
ExecutablePath: /usr/sbin/cupsd
InstallationDate: Installed on 2010-09-24 (773 days ago)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
Lpstat:
 device for davidson-printer: smb://WORKGROUP/EXCALIBUR/Printer2
 device for HP-Color-LaserJet-CM1312-MFP: hp:/usb/HP_Color_LaserJet_CM1312_MFP?serial=00CNB882VG58
 device for HP-PSC-750: ipp://207.224.24.210:631/printers/PSC_750
 device for HP-PSC-750-legal: ipp://207.224.24.210:631/printers/PSC_750
 device for PSC-750: hp:/usb/PSC_750?serial=MY2ASD4157WB
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 3249CTO
MarkForUpload: True
Papersize: letter
PpdFiles:
 HP-PSC-750: HP PSC 750, hpcups 3.12.6
 HP-PSC-750-legal: HP PSC 750, hpcups 3.12.6
 HP-Color-LaserJet-CM1312-MFP: HP Color LaserJet CM1312 MFP Series Postscript (recommended)
 PSC-750: HP PSC 750, hpcups 3.12.6
 davidson-printer: HP Color LaserJet CP3505 Postscript (recommended)
ProcAttrCurrent: /usr/sbin/cupsd (enforce)
ProcCmdline: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic root=/dev/mapper/hostname-root ro quiet splash --verbose
ProcEnviron:
 PATH=(custom, no user)
 TERM=linux
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic root=/dev/mapper/hostname-root ro quiet splash --verbose
SegvAnalysis:
 Segfault happened at: 0x7f204f5df7a3 <_dbus_header_get_byte_order+3>: movzbl (%rax),%eax
 PC (0x7f204f5df7a3) ok
 source "(%rax)" (0x00000269) 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:
 _dbus_header_get_byte_order (header=header@entry=0x7f2051a45598) at ../../dbus/dbus-marshal-header.c:178
 _dbus_header_get_field_basic (header=header@entry=0x7f2051a45598, field=field@entry=5, type=type@entry=117, value=value@entry=0x7f204bdfbd2c) at ../../dbus/dbus-marshal-header.c:1370
 dbus_message_get_reply_serial (message=message@entry=0x7f2051a45590) at ../../dbus/dbus-message.c:1091
 dbus_connection_dispatch (connection=0x7f2051a4c310) at ../../dbus/dbus-connection.c:4574
 ?? () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
Title: cupsd crashed with SIGSEGV in _dbus_header_get_byte_order()
UpgradeStatus: Upgraded to quantal on 2012-06-11 (147 days ago)
UserGroups:

dmi.bios.date: 08/23/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET52WW (1.22 )
dmi.board.name: 3249CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6QET52WW(1.22):bd08/23/2010:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3249CTO
dmi.product.version: ThinkPad X201
dmi.sys.vendor: LENOVO
modified.conffile..etc.cups.cupsd.conf: [modified]
modified.conffile..etc.default.cups: [modified]
mtime.conffile..etc.cups.cupsd.conf: 2012-10-12T13:58:25.498876
mtime.conffile..etc.default.cups: 2010-09-25T01:44:40