Random Kernal Panics on Boot-up

This is just one example of several - any insights would be appreciated. Did a hardware diagnostic and no problems found.

Interval Since Last Panic Report: 36 sec
Panics Since Last Report: 1
Anonymous UUID: F2DED161-E10F-F7FE-3030-E95F73A68D24

Mon Sep 17 22:33:31 2012
panic(cpu 0 caller 0xffffff80178b7bd5): Kernel trap at 0xffffff801782e906, type 12=stack bounds, registers:
CR0: 0x000000008001003b, CR2: 0xffffff808a2ed000, CR3: 0x000000001a5b1000, CR4: 0x0000000000000660
RAX: 0x088bae6161aa007d, RBX: 0xffffff8022bde000, RCX: 0x0000000009000000, RDX: 0xffffff8084280078
RSP: 0xffffff808fa93e40, RBP: 0x01ffff808fa93eb0, RSI: 0xffffff8084280068, RDI: 0x0000000000000000
R8: 0xffffff8017ebec60, R9: 0x0000000000000000, R10: 0xffffff8022c710c0, R11: 0x00000000ffffff80
R12: 0x0000000000000001, R13: 0x0000000000000000, R14: 0xffffff8022ca2000, R15: 0x0000000000000000
RFL: 0x0000000000010046, RIP: 0xffffff801782e906, CS: 0x0000000000000008, SS: 0x0000000000000000
Fault CR2: 0xffffff808a2ed000, Error code: 0x0000000000000000, Fault CPU: 0x0

Backtrace (CPU 0), Frame : Return Address
0xffffff808fa93ae0 : 0xffffff801781d626
0xffffff808fa93b50 : 0xffffff80178b7bd5
0xffffff808fa93d20 : 0xffffff80178ce4ed
0xffffff808fa93d40 : 0xffffff801782e906
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0x1ffff808fa93eb0

BSD process name corresponding to current thread: kernel_task

Mac OS version:
Not yet set

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: 0x0000000017600000
Kernel text base: 0xffffff8017800000
System model name: MacBookAir3,1 (Mac-942452F5819B1C1B)

System uptime in nanoseconds: 1384626287
last loaded kext at 443649958: com.apple.driver.XsanFilter 404 (addr 0xffffff7f9958c000, size 20480)
loaded kexts:
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.2.2
com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0
com.apple.driver.AppleUSBHub 5.2.5
com.apple.driver.AirPort.Brcm4331 602.15.22
com.apple.driver.AppleAHCIPort 2.4.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleUSBEHCI 5.4.0
com.apple.driver.AppleUSBOHCI 5.2.5
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.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.IOUSBUserClient 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.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 2.7.1
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
Model: MacBookAir3,1, BootROM MBA31.0061.B07, 2 processors, Intel Core 2 Duo, 1.6 GHz, 4 GB, SMC 1.67f6
Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54333235533642465238412D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54333235533642465238412D47372020
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: Wi-Fi, AirPort, en0
Network Service: Open Garden, Ethernet, tun0
Serial ATA Device: APPLE SSD TS128C, 121.33 GB
USB Device: FaceTime Camera (Built-in), apple_vendor_id, 0x850a, 0x24600000 / 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, 0x0242, 0x04300000 / 2