Mail App keeps crashing

Hello, I was hoping someone may be able to assist me with my Mail app. It is crashing on it's own.

Please see attached error message (part of).

Thanks in advance.



Process: Mail [10680]
Path: /Applications/Mail.app/Contents/MacOS/Mail
Identifier: com.apple.mail
Version: 4.1 (1076)
Build Info: Mail-10760000~1
Code Type: X86-64 (Native)
Parent Process: launchd [76]

Date/Time: 2009-10-22 20:05:51.197 -0600
OS Version: Mac OS X 10.6.1 (10B504)
Report Version: 6

Interval Since Last Report: 6704 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 5453 sec
Per-App Crashes Since Last Report: 1
Anonymous UUID: 5437B039-0B40-4EB3-8457-FC89CF73A758

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000400000019
Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Application Specific Information:
objc_msgSend() selector name: release

....

Model: MacBookPro5,5, BootROM MBP55.00AC.B03, 2 processors, Intel Core 2 Duo, 2.26 GHz, 2 GB, SMC 1.47f2
Graphics: NVIDIA GeForce 9400M, NVIDIA GeForce 9400M, PCI, 256 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), 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, en1
Serial ATA Device: Hitachi HTS545016B9SA02, 149.05 GB
Serial ATA Device: HL-DT-ST DVDRW GS23N
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8507, 0x24400000
USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0x26500000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0236, 0x04600000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0x04500000
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8213, 0x06110000