My Mail.app on 10.2.8 just died.
If I click on any new unread message, it quits.
Command: Mail
PID: 9480
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000006
Thread 0 Crashed:
#0 0x90247b7c in ALI_GetAliasDataFromAliasPtr
#1 0x00000000 in 0x0
#2 0x902b77e8 in _FSGetAliasInfoFromAliasPtr
#3 0x928122b8 in _LSContainerCheckState
#4 0x92808604 in _LSCopySchemesAndHandlerURLs
#5 0x00017f34 in 0x17f34
#6 0x97dfab58 in _nsNotificationCenterCallBack
#7 0x901684d0 in _postNotification
#8 0x90165be4 in _CFNotificationCenterPostLocalNotification
#9 0x00004a2c in 0x4a2c
#10 0x00016a9c in 0x16a9c
#11 0x00017540 in 0x17540
#12 0x9068c258 in objc_msgSendv
#13 0x97dfcd5c in -[NSInvocation invoke]
#14 0x941f9bdc in _invokeInvocationRequest
#15 0x941fc968 in _handleInvocationRequest
#16 0x941f5524 in -[MainThread handlePortMessage:]
#17 0x97e00450 in __NSFireMachPort
#18 0x9015bd8c in __CFMachPortPerform
#19 0x9015bbf8 in __CFRunLoopDoSource1
#20 0x90148c9c in __CFRunLoopRun
#21 0x90180f58 in CFRunLoopRunSpecific
#22 0x969a3b70 in RunCurrentEventLoopInMode
#23 0x969b3a78 in ReceiveNextEventCommon
#24 0x969dabbc in BlockUntilNextEventMatchingListInMode
#25 0x9308dedc in _DPSNextEvent
#26 0x930a0158 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
#27 0x930b1d88 in -[NSApplication run]
#28 0x9315fc58 in NSApplicationMain
#29 0x00004464 in 0x4464
#30 0x000042e4 in 0x42e4
Thread 1:
#0 0x90014c08 in syscall_thread_switch
#1 0x97e03ef4 in +[NSThread sleepUntilDate:]
#2 0x93081cac in -[NSUIHeartBeat _heartBeatThread:]
#3 0x97e2cc50 in forkThreadForFunction
#4 0x90020c28 in _pthread_body
Thread 2:
#0 0x9002568c in select
#1 0x90161830 in __CFSocketManager
#2 0x90020c28 in _pthread_body
PPC Thread State:
srr0: 0x90247b7c srr1: 0x0000f030 vrsave: 0x00000000
xer: 0x00000000 lr: 0x902b77e8 ctr: 0x902b77b8 mq: 0x00000000
r0: 0x902b77e8 r1: 0xbfffcd90 r2: 0x28008245 r3: 0xbfffce20
r4: 0x00000000 r5: 0x00000000 r6: 0x00000000 r7: 0x00000000
r8: 0xbfffd6d0 r9: 0x019a0000 r10: 0x0199d01c r11: 0xa28003ec
r12: 0x902b77b8 r13: 0x00000000 r14: 0x00000000 r15: 0x00000001
r16: 0x018dc870 r17: 0x00000000 r18: 0x00000002 r19: 0x00000000
r20: 0x01889d40 r21: 0xbfffd750 r22: 0x025494c0 r23: 0xbfffdb84
r24: 0x00000000 r25: 0x00000000 r26: 0x00000000 r27: 0x00000000
r28: 0x00000000 r29: 0x00000000 r30: 0x00000000 r31: 0x92808394
If this helps...
Deleted the com.apple.mail.plist and lost all my accounts

[they are still on the harddrive... but it's going to be some work to get them back up]