Safari Quits as soon as it opens up

starting last night safari on my imac quits unexpectedly every time i try to open it. cannot even send the error msg/report to apple, please help.

below is the report, system config

Model: iMac9,1, BootROM IM91.008D.B08, 2 processors, Intel Core 2 Duo, 2.66 GHz, 4 GB

Graphics: kHW_NVidiaGeForce9400Item, NVIDIA GeForce 9400, sppci_pci_device, 256 MB

Memory Module: global_name

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.10.91.22)

Bluetooth: Version 2.1.9f10, 2 service, 1 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Network Service: Parallels Shared Networking Adapter, Ethernet, en2

Network Service: Parallels Host-Only Networking Adapter, Ethernet, en3

Serial ATA Device: WDC WD6400AAKS-40H2B0, 596.17 GB

Serial ATA Device: PIONEER DVD-RW DVRTS08

USB Device: Built-in iSight, (null) mA

USB Device: HP LaserJet P1006, (null) mA

USB Device: Keyboard Hub, (null) mA

USB Device: Microsoft Optical Mouse with Tilt Wheel, (null) mA

USB Device: Apple Keyboard, (null) mA

USB Device: IR Receiver, (null) mA

USB Device: BRCM2046 Hub, (null) mA

USB Device: Bluetooth USB Host Controller, (null) mA

================

problem detail

=======================

Process: Safari [4935]

Path: /Applications/Safari.app/Contents/MacOS/Safari

Identifier: com.apple.Safari

Version: 5.0.6 (5533.22.3)

Build Info: WebBrowser-75332203~3

Code Type: X86 (Native)

Parent Process: launchd [106]

Interval Since Last Report: 1964 sec

Crashes Since Last Report: 5

Per-App Interval Since Last Report: 54 sec

Per-App Crashes Since Last Report: 5

Date/Time: 2012-05-17 07:50:11.627 -0500

OS Version: Mac OS X 10.5.8 (9L31a)

Report Version: 6

Anonymous UUID: 9B7934C4-8607-40DB-95EA-0447B6121524

Exception Type: EXC_BAD_ACCESS (SIGBUS)

Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000006feff0

Crashed Thread: Unknown

Error Formulating Crash Report:

*** -[NSCFDictionary setObject:forKey:]: attempt to insert nil value (key: VMUSignaturePath)

0x9165afeb

0x97b24e3b

0x9165adcb

0x9165ae0a

0x933f41f8

0x00093b31

0x000a39c1

0x000a3b17

0x000a0bab

0x000038f5

0x0000a992

0x00002ea4

0x000029f1

0x9274af4b

0x0000c254

0x9271f055

0x9271ef12

Backtrace not available

Unknown thread crashed with X86 Thread State (32-bit):

eax: 0xffff07a0 ebx: 0x968f7cc4 ecx: 0x00000038 edx: 0xffb343c0

edi: 0x00bcac70 esi: 0x00beaa74 ebp: 0xb01a3dc8 esp: 0xb01a3dc0

ss: 0x0000001f efl: 0x00010286 eip: 0xffff0f38 cs: 0x00000017

ds: 0x0000001f es: 0x0000001f fs: 0x0000001f gs: 0x00000037

cr2: 0x006feff0

Binary images description not available