What could be causing this occasional macbook pro retina kernel panic?

This occurred when I tried to awaken my MBP Retina. It had been previously disconnected from a 27" Apple LED Cinema Display (Display Port).

Note: no third-party kernel extensions!

Wed Feb 6 10:16:46 2013

panic(cpu 6 caller 0xffffff800f6ad6fe): Preemption level underflow, possible cause unlocking an unlocked mutex or spinlock

Backtrace (CPU 6), Frame : Return Address

0xffffff8102933d60 : 0xffffff800f61d626

0xffffff8102933dd0 : 0xffffff800f6ad6fe

0xffffff8102933de0 : 0xffffff800f6ad48f

0xffffff8102933df0 : 0xffffff800f626690

0xffffff8102933e30 : 0xffffff800f968d26

0xffffff8102933eb0 : 0xffffff800f969124

0xffffff8102933ef0 : 0xffffff800f73c0fa

0xffffff8102933fb0 : 0xffffff800f6b2957

BSD process name corresponding to current thread: kernel_task

Mac OS version:

12C3006

Kernel version:

Darwin Kernel Version 12.2.1: Thu Oct 18 16:32:48 PDT 2012; root:xnu-2050.20.9~2/RELEASE_X86_64

Kernel UUID: 0AFA55FD-872F-3BBE-8630-214EB586A16D

Kernel slide: 0x000000000f400000

Kernel text base: 0xffffff800f600000

System model name: MacBookPro10,1 (Mac-C3EC7CD22292981F)

System uptime in nanoseconds: 3162633811425

last loaded kext at 2195949511889: com.apple.filesystems.afpfs 10.0 (addr 0xffffff7f919e8000, size 348160)

last unloaded kext at 138735631231: com.apple.driver.AppleFileSystemDriver 3.0.1 (addr 0xffffff7f918e1000, size 8192)

loaded kexts:

com.apple.filesystems.afpfs 10.0

com.apple.nke.asp_tcp 7.0.0

com.apple.driver.AppleBluetoothMultitouch 75.19

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AudioAUUC 1.60

com.apple.iokit.IOBluetoothSerialManager 4.1.2f9

com.apple.filesystems.autofs 3.0

com.apple.driver.ApplePlatformEnabler 2.0.6d1

com.apple.driver.AGPM 100.12.81

com.apple.driver.X86PlatformShim 1.0.0

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AppleHDA 2.3.5fc10

com.apple.driver.AppleUSBDisplays 357

com.apple.driver.AppleMikeyDriver 2.3.5fc10

com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.2f9

com.apple.driver.AppleMuxControl 3.2.13

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleSMCLMU 2.0.3d0

com.apple.GeForce 8.0.6

com.apple.driver.AppleUpstreamUserClient 3.5.10

com.apple.driver.AppleMCCSControl 1.1.11

com.apple.driver.AppleLPC 1.6.0

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.ApplePolicyControl 3.2.13

com.apple.driver.AppleIntelHD4000Graphics 8.0.6

com.apple.driver.AppleIntelFramebufferCapri 8.0.6

com.apple.driver.AppleUSBTCButtons 237.1

com.apple.driver.AppleUSBTCKeyboard 237.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 34

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.3.1

com.apple.driver.AppleUSBHub 5.5.0

com.apple.driver.AppleSDXC 1.4.0

com.apple.iokit.AppleBCM5701Ethernet 3.5.0b9

com.apple.driver.AirPort.Brcm4331 612.20.14

com.apple.driver.AppleAHCIPort 2.5.1

com.apple.driver.AppleUSBEHCI 5.5.0

com.apple.driver.AppleUSBXHCI 1.5.1

com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0

com.apple.driver.AppleEFINVRAM 1.7

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleACPIButtons 1.7

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.7

com.apple.driver.AppleAPIC 1.6

com.apple.nke.applicationfirewall 4.0.39

com.apple.security.quarantine 2

com.apple.driver.AppleIntelCPUPowerManagement 196.0.0

com.apple.security.SecureRemotePassword 1.0

com.apple.driver.IOBluetoothHIDDriver 4.1.2f9

com.apple.driver.AppleMultitouchDriver 235.29

com.apple.iokit.IOSerialFamily 10.0.6

com.apple.kext.triggers 1.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5

com.apple.driver.DspFuncLib 2.3.5fc10

com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.2f9

com.apple.driver.X86PlatformPlugin 1.0.0

com.apple.driver.AppleSMBusPCI 1.0.11d0

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.driver.AppleUSBAudio 2.9.0f6

com.apple.iokit.IOAudioFamily 1.8.9fc11

com.apple.kext.OSvKernDSPLib 1.6

com.apple.nvidia.nvGK100hal 8.0.6

com.apple.driver.AppleSMBusController 1.0.11d0

com.apple.NVDAResman 8.0.6

com.apple.driver.AppleHDAController 2.3.5fc10

com.apple.iokit.IOHDAFamily 2.3.5fc10

com.apple.driver.IOPlatformPluginFamily 5.3.0d47

com.apple.iokit.IOSurface 86.0.3

com.apple.iokit.IOBluetoothFamily 4.1.2f9

com.apple.driver.AppleSMC 3.1.4d2

com.apple.driver.AppleGraphicsControl 3.2.13

com.apple.iokit.IONDRVSupport 2.3.6

com.apple.iokit.IOGraphicsFamily 2.3.6

com.apple.driver.AppleUSBHIDKeyboard 170.2

com.apple.driver.AppleHIDKeyboard 170.2

com.apple.driver.AppleUSBMultitouch 237.3

com.apple.iokit.IOUSBHIDDriver 5.2.5

com.apple.driver.AppleUSBMergeNub 5.5.0

com.apple.driver.AppleUSBComposite 5.2.5

com.apple.driver.AppleThunderboltDPInAdapter 1.8.9

com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.9

com.apple.driver.AppleThunderboltPCIUpAdapter 1.2.6

com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.6

com.apple.driver.CoreStorage 296.10

com.apple.driver.AppleThunderboltNHI 1.6.3

com.apple.iokit.IOThunderboltFamily 2.1.8

com.apple.iokit.IOEthernetAVBController 1.0.2b1

com.apple.iokit.IO80211Family 510.4

com.apple.iokit.IONetworkingFamily 3.0

com.apple.iokit.IOUSBUserClient 5.5.0

com.apple.iokit.IOAHCIFamily 2.3.1

com.apple.iokit.IOUSBFamily 5.5.0

com.apple.driver.AppleEFIRuntime 1.7

com.apple.iokit.IOHIDFamily 1.8.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 220

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.DiskImages 344

com.apple.iokit.IOStorageFamily 1.8

com.apple.driver.AppleKeyStore 28.21

com.apple.driver.AppleACPIPlatform 1.7

com.apple.iokit.IOPCIFamily 2.7.3

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0