iPhoto quits constantly

iPhoto has crashed around 40 times this afernoon, I have re-installed it twice already, and downloaded the corresponding update. I have no idea what else to do. Any help?

Process: iPhoto [416]
Path: /Applications/iPhoto.app/Contents/MacOS/iPhoto
Identifier: com.apple.iPhoto
Version: 9.1.1 (9.1.1)
Build Info: iPhotoProject-5270000~1
Code Type: X86 (Native)
Parent Process: launchd [93]

Date/Time: 2011-01-08 23:46:17.760 -0600
OS Version: Mac OS X 10.6.6 (10J567)
Report Version: 6

Interval Since Last Report: 34306 sec
Crashes Since Last Report: 43
Per-App Interval Since Last Report: 2209 sec
Per-App Crashes Since Last Report: 42
Anonymous UUID: 151B0881-83B1-4A89-86D3-1CE1B9697DA9

Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: 0x000000000000000a, 0x000000001efd0000
Crashed Thread: 28

Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB, SMC 1.27f3
Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 256 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.1)
Bluetooth: Version 2.3.8f7, 2 service, 12 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS542525K9SA00, 232.89 GB
Parallel ATA Device: MATSHITADVD-R UJ-867
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0xfd400000
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x820f, 0x1a110000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0230, 0x5d200000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0x5d100000
USB Device: USB Receiver, 0x046d (Logitech Inc.), 0xc521, 0x1d100000