Same here on a Macair. Every third ot fourth time I exit Gugrontid the whole system reboots.
Errorlog:


Interval Since Last Panic Report:  153258 sec
Panics Since Last Report:          6
Anonymous UUID:                    CF83EC3A-938B-6FA5-32E1-EA3716F9215D

Fri Dec 28 08:45:35 2012
panic(cpu 1 caller 0xffffff80146b7bd5): Kernel trap at 0xffffff7f95dba623, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0xffffff80828ea388, CR3: 0x000000004520f000, CR4: 0x0000000000000660
RAX: 0x0000000000000000, RBX: 0x0000000000020000, RCX: 0x0000000000000000, RDX: 0xffffff8082861000
RSP: 0xffffff801c3fb7c0, RBP: 0xffffff801c3fb850, RSI: 0x00000000000224c0, RDI: 0x00000000000224c0
R8:  0x0000000000000000, R9:  0x0000000000000000, R10: 0xffffff802279b5e8, R11: 0xffffff8014c7de88
R12: 0xffffff807905d000, R13: 0xffffff807905d000, R14: 0xffffff801c3fb9a8, R15: 0xffffff807905d000
RFL: 0x0000000000010246, RIP: 0xffffff7f95dba623, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0xffffff80828ea388, Error code: 0x0000000000000000, Fault CPU: 0x1

Backtrace (CPU 1), Frame : Return Address
0xffffff801c3fb460 : 0xffffff801461d626
0xffffff801c3fb4d0 : 0xffffff80146b7bd5
0xffffff801c3fb6a0 : 0xffffff80146ce4ed
0xffffff801c3fb6c0 : 0xffffff7f95dba623
0xffffff801c3fb850 : 0xffffff7f95dbb239
0xffffff801c3fb890 : 0xffffff7f95d76e81
0xffffff801c3fba10 : 0xffffff7f95db77fe
0xffffff801c3fbad0 : 0xffffff7f95d7598a
0xffffff801c3fbb30 : 0xffffff8014a65bc9
0xffffff801c3fbb50 : 0xffffff8014a67170
0xffffff801c3fbbb0 : 0xffffff8014a64b8f
0xffffff801c3fbd00 : 0xffffff80146981e1
0xffffff801c3fbe10 : 0xffffff8014620aed
0xffffff801c3fbe40 : 0xffffff8014610448
0xffffff801c3fbe90 : 0xffffff801461961b
0xffffff801c3fbf00 : 0xffffff80146a59be
0xffffff801c3fbfb0 : 0xffffff80146ceafe
      Kernel Extensions in backtrace:
         com.apple.GeForce(8.0)[2E56ED9A-D848-3795-9E52-56BABDC9000C]@0xffffff7f95d69000->0xffffff7f95e2bfff
            dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f94d2f000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xffffff7f94d1b000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffffff7f94c8d000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0xffffff7f94cd8000

BSD process name corresponding to current thread: psclient_static

Mac OS version:
12C60

Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x0000000014400000
Kernel text base: 0xffffff8014600000
System model name: MacBookAir3,2 (Mac-942C5DF58193131B)

System uptime in nanoseconds: 316214604579
last loaded kext at 9664427445: com.apple.driver.AppleHWSensor   1.9.5d0 (addr 0xffffff7f964e7000, size 36864)
last unloaded kext at 144441877607: com.apple.iokit.SCSITaskUserClient   3.5.1 (addr 0xffffff7f95785000, size 28672)
loaded kexts:
com.apple.driver.AppleHWSensor   1.9.5d0
com.apple.iokit.IOBluetoothSerialManager   4.0.9f33
com.apple.filesystems.autofs   3.0
com.apple.driver.AudioAUUC   1.60
com.apple.driver.ApplePlatformEnabler   2.0.5d4
com.apple.driver.AGPM   100.12.69
com.apple.driver.AppleMikeyHIDDriver   122
com.apple.driver.AppleHDA   2.3.1f2
com.apple.driver.AppleMikeyDriver   2.3.1f2
com.apple.iokit.IOUserEthernet   1.0.0d1
com.apple.Dont_Steal_Mac_OS_X   7.0.0
com.apple.driver.ApplePolicyControl   3.2.11
com.apple.driver.ACPI_SMC_PlatformPlugin   1.0.0
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport   4.0.9f33
com.apple.driver.AppleLPC   1.6.0
com.apple.driver.AppleBacklight   170.2.3
com.apple.driver.AppleUpstreamUserClient   3.5.10
com.apple.driver.AppleMCCSControl   1.0.33
com.apple.GeForce   8.0.0
com.apple.driver.AppleUSBTCButtons   235.4
com.apple.driver.AppleUSBTCKeyboard   235.4
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless   1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib   1.0.0d1
com.apple.BootCache   34
com.apple.driver.AppleUSBCardReader   3.1.0
com.apple.driver.XsanFilter   404
com.apple.iokit.IOAHCIBlockStorage   2.2.2
com.apple.driver.AirPort.Brcm4331   602.15.22
com.apple.driver.AppleAHCIPort   2.4.1
com.apple.driver.AppleUSBHub   5.2.5
com.apple.driver.AppleIntelCPUPowerManagementClient   196.0.0
com.apple.driver.AppleUSBEHCI   5.4.0
com.apple.driver.AppleUSBOHCI   5.2.5
com.apple.driver.AppleEFINVRAM   1.6.1
com.apple.driver.AppleSmartBatteryManager   161.0.0
com.apple.driver.AppleRTC   1.5
com.apple.driver.AppleHPET   1.7
com.apple.driver.AppleACPIButtons   1.6
com.apple.driver.AppleSMBIOS   1.9
com.apple.driver.AppleACPIEC   1.6
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.iokit.IOSerialFamily   10.0.6
com.apple.kext.triggers   1.0
com.apple.driver.DspFuncLib   2.3.1f2
com.apple.iokit.IOAudioFamily   1.8.9fc10
com.apple.kext.OSvKernDSPLib   1.6
com.apple.iokit.IOSurface   86.0.3
com.apple.iokit.IOBluetoothFamily   4.0.9f33
com.apple.driver.IOPlatformPluginLegacy   1.0.0
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport   4.0.9f33
com.apple.driver.AppleSMBusPCI   1.0.10d0
com.apple.driver.IOPlatformPluginFamily   5.2.0d16
com.apple.driver.AppleHDAController   2.3.1f2
com.apple.iokit.IOHDAFamily   2.3.1f2
com.apple.driver.AppleSMC   3.1.4d2
com.apple.driver.AppleGraphicsControl   3.2.11
com.apple.driver.AppleBacklightExpert   1.0.4
com.apple.driver.AppleSMBusController   1.0.10d0
com.apple.nvidia.nv50hal   8.0.0
com.apple.NVDAResman   8.0.0
com.apple.iokit.IONDRVSupport   2.3.5
com.apple.iokit.IOGraphicsFamily   2.3.5
com.apple.driver.AppleUSBMultitouch   235.7
com.apple.iokit.IOUSBHIDDriver   5.2.5
com.apple.driver.CoreStorage   274.7
com.apple.iokit.IOSCSIBlockCommandsDevice   3.5.1
com.apple.iokit.IOUSBMassStorageClass   3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.1
com.apple.driver.AppleUSBMergeNub   5.2.5
com.apple.driver.AppleUSBComposite   5.2.5
com.apple.iokit.IO80211Family   500.15
com.apple.iokit.IONetworkingFamily   3.0
com.apple.driver.AppleMCP89RootPortPM   1.11
com.apple.iokit.IOAHCIFamily   2.2.1
com.apple.iokit.IOUSBUserClient   5.2.5
com.apple.iokit.IOUSBFamily   5.4.0
com.apple.driver.NVSMU   2.2.9
com.apple.driver.AppleEFIRuntime   1.6.1
com.apple.iokit.IOHIDFamily   1.8.0
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   1.6
com.apple.iokit.IOPCIFamily   2.7.2
com.apple.iokit.IOACPIFamily   1.4
com.apple.kec.corecrypto   1.0
Model: MacBookAir3,2, BootROM MBA31.0061.B07, 2 processors, Intel Core 2 Duo, 2.13 GHz, 4 GB, SMC 1.66f60
Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334348302D5946382020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334348302D5946382020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD1), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en0
Serial ATA Device: APPLE SSD TS256C, 251 GB
USB Device: FaceTime Camera (Built-in), apple_vendor_id, 0x850a, 0x24600000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26100000 / 2
USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x04500000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821b, 0x04530000 / 5
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0240, 0x04300000 / 2