System Crash Problem

hi,
I have started encountering a total system crash today for the first time ever. It's happened 3 times already, my screen goes a dark shade, mouse stops working and a message box pops up in the middle of the screen saying 'system has stopped responding please hold the power button for 5 seconds to shut down then press power on to restart. it says that in about 5 languages.
This is the Report i got when i restarted -
Interval Since Last Panic Report: 1 sec
Panics Since Last Report: 2
Anonymous UUID: 2FB40FD0-401A-4F2A-9539-CD21B0B6EDBB
Tue Nov 3 16:27:32 2009
panic(cpu 2 caller 0x555865): "getPhysicalSegment() out of 32b range 0x1011c4000, len 0x1000, class IOGeneralMemoryDescriptor"@/SourceCache/xnu/xnu-1456.1.25/iokit/Kernel/IOMemory Descriptor.cpp:1589
Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
0x61d23bc8 : 0x21acfa (0x5ce650 0x61d23bfc 0x223156 0x0)
0x61d23c18 : 0x555865 (0x5d7bec 0x11c4000 0x1 0x1000)
0x61d23c68 : 0xfcc383 (0xabe4a00 0x0 0x61d23ce8 0xfcdfa9)
0x61d23ca8 : 0xfd15d2 (0xab50100 0xabe2b24 0x1 0x61d23ce4)
0x61d23d38 : 0xfccd2c (0xd2a4b00 0xab50100 0x61d23d6f 0x0)
0x61d23d88 : 0x947953 (0xab50100 0x2 0x0 0xffffffff)
0x61d23de8 : 0x97b037 (0xab44e00 0xadd8980 0x174 0x2)
0x61d23e78 : 0x97b9de (0x6fa13000 0x4 0x6fe26c3c 0xffff)
0x61d23ef8 : 0x97be59 (0x6fa13000 0x9829e0 0x61d23f28 0x52af02)
0x61d23f28 : 0x54b042 (0x6fa13000 0xa4f4bc0 0x0 0x0)
0x61d23f78 : 0x22f3e5 (0xa4f4bc0 0xa38c9b1 0x0 0x0)
0x61d23fc8 : 0x29c68c (0x863ec0 0x0 0x10 0xa180960)
Kernel Extensions in backtrace (with dependencies):
PaeFireStudio(3.0.0)@0x971000->0x982fff
dependency: com.apple.iokit.IOAudioFamily(1.7.0fc16)@0x917000
dependency: com.apple.iokit.IOFireWireFamily(4.1.7)@0x92e000
dependency: com.apple.kext.OSvKernDSPLib(1.3)@0x913000
com.apple.driver.AppleFWOHCI(4.3.4)@0xfc3000->0xfe8fff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x9a9000
dependency: com.apple.iokit.IOFireWireFamily(4.1.7)@0x92e000
com.apple.iokit.IOFireWireFamily(4.1.7)@0x92e000->0x970fff
BSD process name corresponding to current thread: kernel_task
Mac OS version:
10B504
Kernel version:
Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386
System model name: MacPro1,1 (Mac-F4208DC8)
System uptime in nanoseconds: 2908637190296
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0x1001000, size 0x12288) - last unloaded 109398541544
loaded kexts:
com.paceap.kext.pacesupport.snowleopard 5.7.1
com.caiaq.driver.NIUSBHardwareDriver 2.3.5
com.Cycling74.driver.Soundflower 1.4.2
com.Apogee.driver.DuetFWOverideDriver 1.4.4
PaeFireStudio 3.0.0
com.apple.driver.AppleHWSensor 1.9.2d0 - last loaded 31647310840
com.apple.driver.IOBluetoothBNEPDriver 2.2.1f7
com.apple.driver.AppleUpstreamUserClient 3.0.5
com.apple.driver.AppleHDA 1.7.4a1
com.apple.GeForce 6.0.2
com.apple.filesystems.autofs 2.1.0
com.apple.driver.AppleMCEDriver 1.1.9
com.apple.DontSteal_Mac_OSX 7.0.0
com.apple.driver.AudioIPCDriver 1.1.0
com.apple.driver.AppleIntelMeromProfile 19
com.apple.driver.ACPISMCPlatformPlugin 3.4.0a20
com.apple.driver.AppleLPC 1.4.6
com.apple.driver.Oxford_Semi 2.5.0
com.apple.iokit.SCSITaskUserClient 2.5.1
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AirPortBrcm43xx 410.91.20
com.apple.driver.AppleFWOHCI 4.3.4
com.apple.iokit.IOAHCIBlockStorage 1.5.0
com.apple.driver.AppleAHCIPort 2.0.0
com.apple.driver.AppleIntelPIIXATA 2.5.0
com.apple.driver.AppleUSBHub 3.7.8
com.apple.driver.AppleIntel8254XEthernet 2.1.1b7
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleUSBEHCI 3.7.5
com.apple.driver.AppleUSBUHCI 3.7.5
com.apple.driver.AppleACPIButtons 1.3
com.apple.driver.AppleRTC 1.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.3
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 90.0.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.0.11
com.apple.driver.AppleIntelCPUPowerManagement 90.0.0
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.DspFuncLib 1.7.4a1
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.nvidia.nv40hal 6.0.2
com.apple.NVDAResman 6.0.2
com.apple.iokit.IONDRVSupport 2.0
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 73.0
com.apple.iokit.IOGraphicsFamily 2.0
com.apple.iokit.IOBluetoothSerialManager 2.2.1f7
com.apple.iokit.IOSerialFamily 10.0.2
com.apple.iokit.AppleProfileFamily 40
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 3.4.0a20
com.apple.driver.AppleHDAController 1.7.4a1
com.apple.iokit.IOHDAFamily 1.7.4a1
com.apple.iokit.IOAudioFamily 1.7.0fc16
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.CSRUSBBluetoothHCIController 2.2.1f7
com.apple.driver.AppleUSBBluetoothHCIController 2.2.1f7
com.apple.iokit.IOBluetoothFamily 2.2.1f7
com.apple.driver.AppleUSBHIDMouse 1.3.0f1
com.apple.driver.AppleHIDMouse 1.3.0f1
com.apple.driver.AppleUSBMergeNub 3.7.5
com.apple.iokit.IOUSBHIDDriver 3.7.5
com.apple.driver.AppleUSBComposite 3.7.5
com.apple.iokit.IOSCSIBlockCommandsDevice 2.5.1
com.apple.iokit.IOFireWireSerialBusProtocolTransport 2.0.0
com.apple.iokit.IOFireWireSBP2 4.0.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.5.1
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOATAPIProtocolTransport 2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 2.5.1
com.apple.iokit.IO80211Family 300.20
com.apple.iokit.IOFireWireFamily 4.1.7
com.apple.iokit.IOAHCIFamily 2.0.0
com.apple.iokit.IOATAFamily 2.5.0
com.apple.iokit.IOUSBUserClient 3.7.5
com.apple.iokit.IONetworkingFamily 1.8
com.apple.iokit.IOUSBFamily 3.7.8
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
com.apple.driver.DiskImages 281
com.apple.iokit.IOStorageFamily 1.6
com.apple.driver.AppleACPIPlatform 1.3
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0
Model: MacPro1,1, BootROM MP11.005C.B08, 4 processors, Dual-Core Intel Xeon, 2.66 GHz, 5 GB, SMC 1.7f10
Graphics: NVIDIA GeForce 7300 GT, NVIDIA GeForce 7300 GT, PCIe, 256 MB
Memory Module: global_name
AirPort: spairportwireless_card_type_airportextreme (0x14E4, 0x87), Broadcom BCM43xx 1.0 (5.10.91.19)
Bluetooth: Version 2.2.1f7, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en2
PCI Card: NVIDIA GeForce 7300 GT, Display, Slot-1
Serial ATA Device: WDC WD2500AAJS-41RYA0, 232.89 GB
Serial ATA Device: ST31500341AS, 1.36 TB
Parallel ATA Device: PIONEER DVD-RW DVR-112D
USB Device: Audio 8 DJ, 0x17cc, 0x1978, 0xfd500000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x5d200000
USB Device: Hub in Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x1003, 0x3d200000
USB Device: Apple Optical USB Mouse, 0x05ac (Apple Inc.), 0x0304, 0x3d220000
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0x3d210000
USB Device: iLok, 0x088e, 0x5036, 0x3d212000
USB Device: Apple Pro Keyboard, 0x05ac (Apple Inc.), 0x020c, 0x3d230000
USB Device: Nocturn, 0x1235, 0x000a, 0x3d100000
FireWire Device: built-in_hub, Up to 800 Mb/sec
FireWire Device: d2 Quadra (button), LaCie SA, Up to 800 Mb/sec
FireWire Device: FIRESTUDIO_PROJECT, PreSonus, Up to 400 Mb/sec
Anyone have any ideas or help as to why this has just started happening?
I've never had this type of crash in 3 years.
Many thanks for any help or suggestions.
Tom

P.s -
I did a system repair in disk utility and this is what it came back with when it had done it -
Repairing permissions for “Macintosh HD”
Permissions differ on "private/etc/postfix/main.cf.default", should be -rw-r--r-- , they are -r--r--r-- .
Repaired "private/etc/postfix/main.cf.default".
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/DesktopServicesPriv.framework/Versions/A/Reso urces/Locum" has been modified and will not be repaired.
Permissions repair complete

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I recently upgraded my MacBook Pro to OS10.8. Shortly afterwards I started having the system crash about once a day - sometimes more frequently. It only does it when using apple mail and firefox after having been dormant for a while. It basically goes blank and then after about 30 seconds gives a gray error page and starts to re-boot. The service folks didn't detect any hardware problems. It has 8 GB of ram. All suggestions are welcome.

If you have more than one user account, you must be logged in as an administrator to carry out these instructions.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Select the most recent panic log under the heading System Diagnostic Reports on the left. If you don't see that heading, select
View ▹ Show Log List from the menu bar. Post the entire contents of the panic report — the text, please, not a screenshot. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post shutdownStall, spin, or hang reports.

System Crashes after Blue Dots

It's mainly light blue dots that sometimes appear in small parts of contrast, like for example along the shadow of a window or something. Then if time goes by the blue dots become so many that they're all over my screen. They start creeping all over until my computer malfunctions, vertical lines of either blue or yellow appear and start flashing and kind of going from left and right like a meter would measure volume. Then my mouse stops moving, and shortly thereafter my system crashes!
It happens a few times a day. I've tried fsck and Disk Utility but it doesn't fix it. I know its not my OS because i recently changed from 10.2.8. to 10.4.2. and the problem carried on. Could I have a virus?

It's mainly light blue dots that sometimes appear in small parts of contrast, like for example along the shadow of a window or something. Then if time goes by the blue dots become so many that they're all over my screen. They start creeping all over until my computer malfunctions, vertical lines of either blue or yellow appear and start flashing and kind of going from left and right like a meter would measure volume. Then my mouse stops moving, and shortly thereafter my system crashes!
It happens a few times a day. I've tried fsck and Disk Utility but it doesn't fix it. I know its not my OS because i recently changed from 10.2.8. to 10.4.2. and the problem carried on. Could I have a virus?

IMovie has frozen up on me. I've tried rebooting and reinstalling the apps- no help. I can play some of the files- but I can't get into the libraries.Even when I can get something to play the whole system crashes after a few minutes. What can I do?

I desperately need your help. I was working on iMovie last night when the thing froze up on me. I've tried rebooting. I've tried reinstalling the apps. No change. I can play some of the files- although I can't tell which ones will play until they magically appear. I can't get into the project library or the event library. The bar that lets me scroll through the clips is gone. Even when I can get something to play the whole system crashes after a couple of minutes and generates a "problem report" that says "iMovie Quit Unexpectedly". This all started when I was adding cutaways- and one clip just would not load. After I tried several times everything froze up. Have you ever heard of something like this? Maybe I pushed a button or somehow changed a setting? Maybe some of the video is corrupt? What do you recommend?
Thanks for any advice you can offer!

I have tried all the above and nothing seems to work. Any other suggestions?

System Crash Problem

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