MacBook Pro OS X keeps crashing

Hello, first-time user here!

My MacBook Pro OS X keeps crashing, Version 10.5.8

I had it in to AppleCare last month to replace an overheating graphics board. The replacement worked, but now my Mac crashes once or twice per session-- sometimes as little as 20 minutes.

Can anyone advise me of possible reasons why?

I usually use FireFox as my browser, but I switched to Safari to see if it made any difference. Both crash. I'm often browsing and watching videos when the crash occurs, and makes me hard-power down.

Info from the last crash (this morning) appears below.

Thanks in advance for your help!


Interval Since Last Panic Report: 2620 sec
Panics Since Last Report: 1
Anonymous UUID: 87245777-7A6F-4BE2-AB72-79D9D142BF21

Mon Mar 21 18:06:57 2011
panic(cpu 0 caller 0x001AB0FE): Kernel trap at 0x00180732, type 14=page fault, registers:
CR0: 0x80010033, CR2: 0x00000004, CR3: 0x014cb000, CR4: 0x00000660
EAX: 0x00000000, EBX: 0x02ac41ec, ECX: 0x06e004ec, EDX: 0x00000000
CR2: 0x00000004, EBP: 0x2ecdfcb8, ESI: 0x06e004ec, EDI: 0x02b3dcc0
EFL: 0x00010287, EIP: 0x00180732, CS: 0x00000008, DS: 0x28130010
Error code: 0x00000002

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x2ecdfac8 : 0x12b4c6 (0x45f91c 0x2ecdfafc 0x13355c 0x0)
0x2ecdfb18 : 0x1ab0fe (0x469a98 0x180732 0xe 0x469248)
0x2ecdfbf8 : 0x1a1713 (0x2ecdfc10 0x0 0x2ecdfcb8 0x180732)
0x2ecdfc08 : 0x180732 (0xe 0x48 0x10 0x10)
0x2ecdfcb8 : 0x1757ed (0x2ac41ec 0x31937 0x2ecdfcd8 0x1a436f)
0x2ecdfcf8 : 0x175e2b (0x1 0x26a56a83 0xd15c8433 0x0)
0x2ecdfd38 : 0x17625d (0x6e004f4 0x0 0x1547d000 0x0)
0x2ecdfd78 : 0x16af8b (0x6e004ec 0x5435fd0 0x0 0x1547d000)
0x2ecdfe98 : 0x16b18d (0x1547d000 0x0 0x0 0x0)
0x2ecdfed8 : 0x1836b5 (0x4e04174 0x153fd000 0x0 0x1547d000)
0x2ecdff38 : 0x37aaae (0x4e04174 0x153fd000 0x0 0x80000)
0x2ecdff78 : 0x3e3a7f (0x47649e8 0x503aa00 0x503aa44 0x620b)
0x2ecdffc8 : 0x1a1c0a (0x4ce3280 0x0 0x1a40b5 0x5d46208)
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xbfffc0e8

BSD process name corresponding to current thread: firefox-bin

Mac OS version:
9L31a

Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386
System model name: MacBookPro3,1 (Mac-F42388C8)

System uptime in nanoseconds: 3010001328587
unloaded kexts:
com.apple.driver.InternalModemSupport 2.4.0 - last unloaded 97256459568
loaded kexts:
com.microsoft.driver.MicrosoftMouseUSB 7.0.0
com.microsoft.driver.MicrosoftMouse 7.0.0
com.apple.driver.AppleHWSensor 1.9d0 - last loaded 18215561489
com.apple.driver.InternalModemSupport 2.4.0
com.apple.iokit.IOBluetoothSerialManager 2.1.9f10
com.apple.filesystems.autofs 2.0.2
com.apple.driver.CSRUSBBluetoothHCIController 2.1.9f10
com.apple.driver.AppleHDAPlatformDriver 1.7.1a2
com.apple.driver.CSRHIDTransitionDriver 2.1.9f10
com.apple.driver.AppleUpstreamUserClient 2.7.5
com.apple.driver.AppleHDAHardwareConfigDriver 1.7.1a2
com.apple.driver.AppleHDA 1.7.1a2
com.apple.driver.SMCMotionSensor 2.1.1d2
com.apple.GeForce 5.4.8
com.apple.Dont_Steal_Mac_OS_X 6.0.3
com.apple.driver.AppleGraphicsControl 2.8.15
com.apple.nvidia.nv50hal 5.4.8
com.apple.driver.AirPort.Atheros 320.16.2
com.apple.iokit.IOFireWireIP 1.7.7
com.apple.driver.AppleIRController 113
com.apple.driver.AudioIPCDriver 1.0.6
com.apple.kext.AppleSMCLMU 1.4.5d1
com.apple.driver.ACPI_SMC_PlatformPlugin 3.4.0a17
com.apple.driver.AppleLPC 1.3.1
com.apple.driver.AppleBacklight 1.6.0
com.apple.driver.AppleHDAController 1.7.1a2
com.apple.driver.AppleTyMCEDriver 1.0.0d28
com.apple.driver.AppleUSBTrackpad 1.7.4f1
com.apple.driver.AppleUSBTCKeyEventDriver 1.7.4f1
com.apple.driver.AppleUSBTCKeyboard 1.7.4f1
com.apple.driver.AppleUSBMergeNub 3.5.2
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.1.1
com.apple.iokit.SCSITaskUserClient 2.1.1
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOAHCIBlockStorage 1.2.2
com.apple.iokit.IOATAPIProtocolTransport 1.5.3
com.apple.driver.AppleFWOHCI 3.9.7
com.apple.driver.AppleUSBHub 3.4.9
com.apple.driver.AppleFileSystemDriver 1.1.0
com.apple.iokit.IOUSBUserClient 3.5.2
com.apple.iokit.AppleYukon2 3.1.13b2
com.apple.driver.AppleAHCIPort 1.7.0
com.apple.driver.AppleIntelPIIXATA 2.0.1
com.apple.driver.AppleEFINVRAM 1.2.0
com.apple.driver.AppleUSBUHCI 3.5.2
com.apple.driver.AppleUSBEHCI 3.4.6
com.apple.driver.AppleSmartBatteryManager 158.10.5
com.apple.driver.AppleRTC 1.2.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleACPIPCI 1.2.5
com.apple.driver.AppleACPIButtons 1.2.5
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.2.5
com.apple.driver.AppleAPIC 1.4
com.apple.security.seatbelt 107.12
com.apple.nke.applicationfirewall 1.8.77
com.apple.security.TMSafetyNet 3
com.apple.driver.AppleIntelCPUPowerManagement 76.2.0
com.apple.driver.DiskImages 199
com.apple.BootCache 30.4
com.apple.iokit.IOSerialFamily 9.4
com.apple.driver.AppleUSBBluetoothHCIController 2.1.9f10
com.apple.iokit.IOBluetoothFamily 2.1.9f10
com.apple.driver.DspFuncLib 1.7.1a2
com.apple.NVDAResman 5.4.8
com.apple.iokit.IO80211Family 216.1
com.apple.iokit.IOAudioFamily 1.6.9fc5
com.apple.kext.OSvKernDSPLib 1.1
com.apple.driver.IOPlatformPluginFamily 3.4.0a17
com.apple.driver.AppleSMC 2.3.1d1
com.apple.iokit.IONDRVSupport 1.7.3
com.apple.iokit.IOGraphicsFamily 1.7.3
com.apple.iokit.IOHDAFamily 1.7.1a2
com.apple.iokit.IOUSBHIDDriver 3.4.6
com.apple.driver.AppleUSBComposite 3.2.0
com.apple.iokit.IOSCSIBlockCommandsDevice 2.1.1
com.apple.iokit.IOBDStorageFamily 1.5
com.apple.iokit.IODVDStorageFamily 1.5
com.apple.iokit.IOCDStorageFamily 1.5
com.apple.iokit.IOSCSIArchitectureModelFamily 2.1.1
com.apple.iokit.IOFireWireFamily 3.4.9
com.apple.iokit.IONetworkingFamily 1.6.1
com.apple.iokit.IOAHCIFamily 1.5.0
com.apple.iokit.IOATAFamily 2.0.1
com.apple.iokit.IOUSBFamily 3.5.2
com.apple.driver.AppleEFIRuntime 1.2.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.iokit.IOStorageFamily 1.5.6
com.apple.iokit.IOHIDFamily 1.5.5
com.apple.driver.AppleACPIPlatform 1.2.5
com.apple.iokit.IOACPIFamily 1.2.0
com.apple.iokit.IOPCIFamily 2.6

Sounds like the repair was unsuccessful, and I wouldn't waste any time getting it back to Apple.
You have 90days warranty on repairs.
It could be another faulty Logic board, or poorly applied thermal paste.
Regardless of what the issue is, I would get straight in there.

Thanks for your response, 6string! I need to do my taxes first, then I'll take the critter in. I appreciate your feedback. Cheers!

And take the log in with you.