Here's some more data. The first page of the crash dump. The corroborating evidence is the fact that there is addressbook related stuff on the top of the stack:
Process: Mail [4357]
Path: /Applications/Mail.app/Contents/MacOS/Mail
Identifier: com.apple.mail
Version: 6.0 (1485)
Build Info: Mail-1485000000000000~3
Code Type: X86-64 (Native)
Parent Process: launchd [333]
User ID: 509
Date/Time: 2012-07-31 10:32:23.189 -0700
OS Version: Mac OS X 10.8 (12A269)
Report Version: 10
Sleep/Wake UUID: 92628109-2395-4759-921D-5FF92910E305
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000
VM Regions Near 0:
-->
__TEXT 0000000104197000-0000000104534000 [ 3700K] r-x/rwx SM=COW /Applications/Mail.app/Contents/MacOS/Mail
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_c.dylib 0x00007fff8f449690 strlen + 16
1 com.apple.AddressBook.framework 0x00007fff91767f58 ABInitFileLock + 34
2 com.apple.AddressBook.framework 0x00007fff9176474c -[ABAddressBook nts_InitDefaultContactManager] + 250
3 com.apple.AddressBook.framework 0x00007fff9176452c +[ABAddressBook nts_SharedAddressBook] + 82
4 com.apple.AddressBook.framework 0x00007fff9176443b +[ABAddressBook nts_CreateSharedAddressBook] + 49
5 com.apple.AddressBook.framework 0x00007fff91763788 +[ABAddressBook sharedAddressBook] + 69
6 com.apple.AddressBook.framework 0x00007fff91785a01 +[ABAddressBook addressBookWithDatabaseDirectory:options:] + 60
7 com.apple.MessageFramework 0x00007fff8b9cdd5a +[MailAccount _setMailAccounts:calledFromSync:reloadingFromPreferences:] + 2595
8 com.apple.MessageFramework 0x00007fff8b9c9184 +[MailAccount reloadMailAccounts] + 61
9 com.apple.MessageFramework 0x00007fff8b9c9132 +[MailAccount _mailAccountsIncludingUnknownTypes] + 29
10 com.apple.MessageFramework 0x00007fff8b9c9056 +[MailAccount mailAccounts] + 61
11 com.apple.MessageFramework 0x00007fff8b9d014f +[MailAccount haveAccountsBeenConfigured] + 47
12 com.apple.mail 0x000000010419ae58 0x104197000 + 15960
13 com.apple.CoreFoundation 0x00007fff85971b8a _CFXNotificationPost + 2554
14 com.apple.Foundation 0x00007fff8a781a76 -[NSNotificationCenter postNotificationName:object:userInfo:] + 64
15 com.apple.mail 0x00000001041997d5 0x104197000 + 10197
16 com.apple.AppKit 0x00007fff8e933f5d -[NSApplication _postDidFinishNotification] + 292
17 com.apple.AppKit 0x00007fff8e933c96 -[NSApplication _sendFinishLaunchingNotification] + 216
18 com.apple.AppKit 0x00007fff8e930ec2 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 566
19 com.apple.AppKit 0x00007fff8e930abc -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 351
20 com.apple.Foundation 0x00007fff8a79b35b -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 308
21 com.apple.Foundation 0x00007fff8a79b1bd _NSAppleEventManagerGenericHandler + 106
22 com.apple.AE 0x00007fff887f8f68 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 307
23 com.apple.AE 0x00007fff887f8dc9 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 37
24 com.apple.AE 0x00007fff887f8c89 aeProcessAppleEvent + 318
25 com.apple.HIToolbox 0x00007fff8ae69e29 AEProcessAppleEvent + 100
26 com.apple.AppKit 0x00007fff8e92d2a6 _DPSNextEvent + 1456
27 com.apple.AppKit 0x00007fff8e92c862 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
28 com.apple.AppKit 0x00007fff8e923c03 -[NSApplication run] + 517
29 com.apple.AppKit 0x00007fff8e8c8656 NSApplicationMain + 869
30 libdyld.dylib 0x00007fff91cb27e1 start + 1