I thought this might help you guys figure it out. I don't have the first idea what this information means, but perhaps you do. It's the iCal crash log file.
Date/Time: 2002-09-10 09:06:28 -0400
OS Version: 10.2 (Build 6C115)
Host: xxxxxxxxxxxxxxxxxxxxxxxxx
Command: iCal
PID: 421
Exception: EXC_BREAKPOINT (0x0006)
Code[0]: 0x00000001Code[1]: 0x90844988
Thread 0 Crashed:
#0 0x90844988 in _NSRaiseError
#1 0x90844810 in +[NSException raise:format:]
#2 0x907e50b8 in -[NSCFDictionary setObject:forKey:]
#3 0x0008e7c4 in 0x8e7c4
#4 0x931603cc in -[NSCustomImageRep draw]
#5 0x931c7eec in -[NSImageRep drawAtPoint:]
#6 0x931c0174 in -[NSImage drawRepresentation:inRect:]
#7 0x931c026c in -[NSImage _drawRepresentation:]
#8 0x931c0448 in -[NSImage _cacheRepresentation:stayFocused:]
#9 0x931c0364 in -[NSImage _cacheRepresentation:]
#10 0x931c5534 in -[NSImage _composite:delta:fromRect:toPoint:]
#11 0x931c43d0 in -[NSImage compositeToPoint:fromRect

peration:]
#12 0x931c4294 in -[NSImage compositeToPoint

peration:]
#13 0x930cecd0 in -[NSApplication _setApplicationIconImage:setDockImage:]
#14 0x0008eb94 in 0x8eb94
#15 0x9081d348 in -[NSSet makeObjectsPerformSelector:]
#16 0x931b9740 in -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:]
#17 0x93238104 in old_loadNib
#18 0x93237cf4 in +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone

wnerBundle:]
#19 0x93237de8 in +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:]
#20 0x932377f4 in +[NSBundle(NSNibLoading) loadNibNamed

wner:]
#21 0x930d253c in NSApplicationMain
#22 0x00004a58 in 0x4a58
#23 0x000048d8 in 0x48d8
Thread 1:
#0 0x90074328 in mach_msg_trap
#1 0x90006670 in mach_msg
#2 0xc00076a4 in __ape_internal
#3 0xc0000e08 in __ape_agent
#4 0x90021428 in _pthread_body
PPC Thread State:
srr0: 0x90844988 srr1: 0x0202f030 vrsave: 0x00000000
xer: 0x20000000 lr: 0x90844964 ctr: 0x907e4270 mq: 0x00000000
r0: 0x00000000 r1: 0xbffff2e0 r2: 0x22004247 r3: 0xa07ed3b8
r4: 0x9068d51c r5: 0x00000000 r6: 0x90015040 r7: 0x20000000
r8: 0x00110010 r9: 0xa07e0294 r10: 0x00000003 r11: 0x00000000
r12: 0x22004247 r13: 0x000b0000 r14: 0xa07ee858 r15: 0x000c0000
r16: 0x001c69c0 r17: 0x000b0000 r18: 0x000c0000 r19: 0x000c0000
r20: 0x000c0000 r21: 0x000c0000 r22: 0x42700000 r23: 0x000c0000
r24: 0x000b0000 r25: 0x000c0000 r26: 0x015bf2c0 r27: 0x00000000
r28: 0x906d3918 r29: 0x015c0be0 r30: 0xa3086edc r31: 0x908448a8