Error message in trace sounds like something crashing in graphics switching. You could try calling support and see what they say. Tier one Apple Support is actually pretty decent. A few of our techs came from Apples Support call department and they actually are really talented guys. Worst case, you reinstall and that doesn't help, and the machine either gets swapped out or repaired. A win for you either way.
Thank you all for your replies. I'm not using any third party hardware (for instance, I have not updated the RAM). In case someone has an idea how to interpret the log message, here is the whole thing, from the last panic:
Sat Aug 14 23:38:17 2010
panic(cpu 2 caller 0x2a8ab2): Kernel trap at 0x00000000, type 14=page fault, registers:
CR0: 0x80010033, CR2: 0x00000000, CR3: 0x3a3b8000, CR4: 0x00000660
EAX: 0x0aa35700, EBX: 0x00000000, ECX: 0x0000000c, EDX: 0x0aea5e80
CR2: 0x00000000, EBP: 0x926dbc68, ESI: 0x0aea5e80, EDI: 0x44cbd000
EFL: 0x00010246, EIP: 0x00000000, CS: 0x00000008, DS: 0x00ac0010
Error code: 0x00000010
Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
0x926dba48 : 0x21b455 (0x5cf328 0x926dba7c 0x2238b1 0x0)
0x926dba98 : 0x2a8ab2 (0x591664 0x0 0xe 0x59182e)
0x926dbb78 : 0x29e9a8 (0x926dbb90 0xaf01f20 0x926dbc68 0x0)
0x926dbb88 : 0x0 (0xe 0x5ae20048 0x5ae20010 0x10)
0x926dbc68 : 0x5b6b6a75 (0x44cbd000 0xaea5e80 0x0 0x0)
0x926dbc98 : 0x5b6c069f (0x44cbd000 0xb04a6dc 0xaea5e80 0x5b6a0e6a)
0x926dbcd8 : 0x5b6c07e5 (0xb04a400 0x44cbd000 0xb04a720 0x8)
0x926dbd08 : 0x5b69a46a (0xb04a400 0x44cbd000 0x926dbd38 0x213e04)
0x926dbd38 : 0x53352d (0x44cbd000 0x7ca93e8 0x7ca93e8 0x1)
0x926dbd88 : 0x56440a (0x44cbd000 0x7ca93e8 0x7ca93e8 0x1)
0x926dbde8 : 0x2850e5 (0x44cbd000 0x7ca93e8 0x1 0x0)
0x926dbe58 : 0x21d7f7 (0x71dbd68 0x88fa284 0x71dbd6c 0x71dbda4)
0x926dbe98 : 0x210983 (0x71dbd00 0x926dbedc 0x921947c 0x926dbed0)
0x926dbef8 : 0x216be6 (0x71dbd00 0x0 0x0 0x0)
0x926dbf78 : 0x293eb4 (0x9075608 0x0 0x0 0x0)
0x926dbfc8 : 0x29f48d (0x9075604 0x1 0x10 0x9075a84)
Kernel Extensions in backtrace (with dependencies):
com.apple.driver.AppleIntelHDGraphics(6.1.6)@0x5b696000->0x5b742fff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x534ce000
dependency: com.apple.iokit.IONDRVSupport(2.1)@0x5ace0000
dependency: com.apple.iokit.IOGraphicsFamily(2.1)@0x5b573000
BSD process name corresponding to current thread: Safari
Mac OS version:
10F569
Kernel version:
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 83146362604543
unloaded kexts:
com.apple.filesystems.msdosfs 1.6.1 (addr 0x5ac45000, size 0x53248) - last unloaded 9521950044219
loaded kexts:
com.AmbrosiaSW.AudioSupport 3.2
com.apple.driver.AppleHWSensor 1.9.3d0 - last loaded 8958652297489
com.apple.driver.AGPM 100.12.12
com.apple.driver.AudioAUUC 1.4
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.iokit.CHUDUtils 364
com.apple.iokit.CHUDProf 364
com.apple.driver.AppleMikeyHIDDriver 1.2.0
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AppleMikeyDriver 1.8.7f1
com.apple.driver.AppleIntelHDGraphics 6.1.6
com.apple.driver.AppleHDA 1.8.7f1
com.apple.driver.AppleUpstreamUserClient 3.3.2
com.apple.driver.AppleIntelHDGraphicsFB 6.1.6
com.apple.driver.SMCMotionSensor 3.0.0d4
com.apple.iokit.AppleBCM5701Ethernet 2.3.8b2
com.apple.kext.AppleSMCLMU 1.5.0d3
com.apple.driver.AppleGraphicsControl 2.8.63
com.apple.GeForce 6.1.6
com.apple.driver.AirPortBrcm43224 425.16.2
com.apple.driver.ACPI_SMC_PlatformPlugin 4.1.2b1
com.apple.driver.AppleLPC 1.4.12
com.apple.filesystems.autofs 2.1.0
com.apple.driver.AppleUSBTCButtons 1.8.1b1
com.apple.driver.AppleUSBTCKeyboard 1.8.1b1
com.apple.driver.AppleIRController 303.8
com.apple.driver.AppleUSBCardReader 2.5.4
com.apple.iokit.SCSITaskUserClient 2.6.5
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.iokit.IOAHCIBlockStorage 1.6.2
com.apple.driver.AppleUSBHub 4.0.0
com.apple.driver.AppleSmartBatteryManager 160.0.0
com.apple.driver.AppleFWOHCI 4.7.1
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleUSBEHCI 4.0.2
com.apple.driver.AppleAHCIPort 2.1.2
com.apple.driver.AppleUSBUHCI 4.0.2
com.apple.driver.AppleACPIButtons 1.3.2
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleSMBIOS 1.6
com.apple.driver.AppleACPIEC 1.3.2
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 105.10.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 105.10.0
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOSurface 74.0
com.apple.iokit.IOBluetoothSerialManager 2.3.7f1
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.CHUDKernLib 364
com.apple.driver.DspFuncLib 1.8.7f1
com.apple.driver.AppleSMBusController 1.0.8d0
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.AppleProfileFamily 41.4
com.apple.driver.AppleHDAController 1.8.7f1
com.apple.iokit.IOHDAFamily 1.8.7f1
com.apple.iokit.IOAudioFamily 1.7.6fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.iokit.IO80211Family 311.1
com.apple.iokit.IONetworkingFamily 1.9
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 4.1.2b1
com.apple.driver.AppleSMBusPCI 1.0.8d0
com.apple.nvidia.nv50hal 6.1.6
com.apple.NVDAResman 6.1.6
com.apple.iokit.IONDRVSupport 2.1
com.apple.iokit.IOGraphicsFamily 2.1
com.apple.driver.BroadcomUSBBluetoothHCIController 2.3.7f1
com.apple.driver.AppleUSBBluetoothHCIController 2.3.7f1
com.apple.iokit.IOBluetoothFamily 2.3.7f1
com.apple.driver.AppleUSBMultitouch 205.32
com.apple.iokit.IOUSBHIDDriver 4.0.2
com.apple.iokit.IOUSBMassStorageClass 2.6.1
com.apple.driver.AppleUSBMergeNub 4.0.0
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.5
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.5
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOAHCISerialATAPI 1.2.4
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.5
com.apple.iokit.IOUSBUserClient 4.0.0
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IOAHCIFamily 2.0.4
com.apple.iokit.IOUSBFamily 4.0.2
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.5
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.TMSafetyNet 6
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 283
com.apple.iokit.IOStorageFamily 1.6.1
com.apple.driver.AppleACPIPlatform 1.3.2
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0
System Profile:
Model: MacBookPro6,2, BootROM MBP61.0057.B09, 2 processors, Intel Core i5, 2.4 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.10.131.16.1)
Bluetooth: Version 2.3.7f1, 2 service, 12 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS545032B9SA02, 298.09 GB
Serial ATA Device: MATSHITADVD-R UJ-898
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8507, 0xfd110000
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000
USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa130000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0237, 0xfa120000
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8218, 0xfa113000