Entourage is also crashing for me. I have narrowed it down to copying a message from one IMAP mailbox to another. It appears to happen when it is copied manually or with a rule.
Leopard Crash Details.
Process: Microsoft Entourage [3307]
Path: /Applications/Microsoft Office 2004/Microsoft Entourage
Identifier: com.microsoft.Entourage
Version: 080122 (11.4.0)
Code Type: PPC (Native)
Parent Process: launchd [396]
Date/Time: 2008-04-05 13:21:11.593 -0400
OS Version: Mac OS X 10.5.2 (9C7010)
Report Version: 6
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread: 18
Thread 0:
0 libSystem.B.dylib 0x967fb978 mach_msg_trap + 8
1 ??? 0x01a5b9b8 0 + 27638200
2 ...ple.CoreServices.CarbonCore 0x901805ec YieldToThread + 528
3 ...ple.CoreServices.CarbonCore 0x901803c8 YieldToAnyThread + 16
4 ??? 0x01593a00 0 + 22624768
5 ??? 0x015a4bd0 0 + 22694864
6 ??? 0x0158db4c 0 + 22600524
7 ??? 0x0159ba94 0 + 22657684
8 ??? 0x01598840 0 + 22644800
9 ??? 0x01598650 0 + 22644304
10 ??? 0x015985bc 0 + 22644156
11 ??? 0x015984a4 0 + 22643876
12 ??? 0x015244d0 0 + 22168784
13 ??? 0x01524d6c 0 + 22170988
14 com.apple.HIToolbox 0x958b6f68 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1484
15 com.apple.HIToolbox 0x958b6100 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 464
16 com.apple.HIToolbox 0x958b5f1c SendEventToEventTargetWithOptions + 52
17 com.apple.HIToolbox 0x9596b8e4 SendSimpleControlEvent(HIView*, unsigned long) + 84
18 com.apple.HIToolbox 0x95979cd4 HIView:
eactivate(unsigned char) + 44
19 com.apple.HIToolbox 0x95979c8c DeactivateControl + 32
20 ??? 0x01a5e1b0 0 + 27648432
21 ??? 0x012410ac 0 + 19140780
22 ??? 0x01a6aef8 0 + 27700984
23 ??? 0x0123ce3c 0 + 19123772
24 ??? 0x01a28fd0 0 + 27430864
25 ??? 0x0123b6a4 0 + 19117732
26 ??? 0x01239b2c 0 + 19110700
27 ??? 0x012f0f80 0 + 19861376
28 ??? 0x012f3444 0 + 19870788
29 ??? 0x01324690 0 + 20072080
30 ??? 0x01e8f298 0 + 32043672
31 ??? 0x01e8f130 0 + 32043312
32 ??? 0x01e8fc30 0 + 32046128
33 ??? 0x01d4cce0 0 + 30723296
34 ??? 0x01325bb8 0 + 20077496
35 ??? 0x019fee64 0 + 27258468
36 ??? 0x019fea44 0 + 27257412
37 ??? 0x01a10548 0 + 27329864
38 ??? 0x010c11d8 0 + 17568216
39 ??? 0x01a102bc 0 + 27329212
40 ??? 0x010be2f8 0 + 17556216
41 ??? 0x01548310 0 + 22315792
Thread 1:
0 libSystem.B.dylib 0x9686e0b8 accept$NOCANCEL$UNIX2003 + 12
1 libSystem.B.dylib 0x968a4fd8 accept + 16
2 ??? 0x01bfb568 0 + 29341032
3 ...ple.CoreServices.CarbonCore 0x90150fc4 PrivateMPEntryPoint + 76
4 ...ple.CoreServices.CarbonCore 0x90150fc4 PrivateMPEntryPoint + 76
5 libSystem.B.dylib 0x9683db98 _pthread_start + 316
Thread 2:
0 libSystem.B.dylib 0x96858870 recvfrom