Steps reproducing the problem?
1. Disable all addons except Prat-3.0-Beta 11 and WIM-v3.0.3b
2. Send whisper to self or another toon
3. Close WIM Window
4. Game will crash to OS

Do you have an error log of what happened?

WoWBuild: 19056
Realm: Uther [72.5.213.110:3724]
Local Zone: Light's Hope Chapel, Eastern Plaguelands
Local Player: Gandafor, 00000000000CD56B, (2272.8,-5331.64,87.9769)
Add Ons: Prat-3.0 Prat-3.0_HighCPUUsageModules Prat-3.0_Libraries WIM
Settings:
SET locale "enUS"
SET portal "us"
SET realmList "us.logon.worldofwarcraft.com";
SET patchlist "us.version.worldofwarcraft.com";
SET coresDetected "2"
SET hwDetect "0"
SET gxColorBits "24"
SET gxDepthBits "24"
SET gxResolution "1680x1050"
SET gxRefresh "60"
SET gxVSync "0"
SET gxMultisampleQuality "0.000000"
SET gxFixLag "0"
SET videoOptionsVersion "1"
SET textureFilteringMode "0"
SET movie "0"
SET expansionMovie "0"
SET checkAddonVersion "0"
SET mouseSpeed "0.80000001192093"
SET Gamma "1.000000"
SET readTOS "1"
SET readEULA "1"
SET showToolsUI "1"
SET Sound_VoiceChatInputDriverName "System Default"
SET Sound_VoiceChatOutputDriverName "System Default"
SET Sound_OutputDriverName "System Default"
SET ChatMusicVolume "0.29999998211861"
SET ChatSoundVolume "0.39999997615814"
SET ChatAmbienceVolume "0.29999998211861"
SET Sound_MusicVolume "0.40000000596046"
SET Sound_AmbienceVolume "0.60000002384186"
SET farclip "397"
SET specular "1"
SET particleDensity "1.000000"
SET groundEffectDensity "24"
SET realmName "Uther"
SET gameTip "5"
SET VoiceActivationSensitivity "0.39999997615814"
SET Sound_MasterVolume "0.20000000298023"
SET gxWindow "1"
SET showGameTips "0"
SET taintLog "1"

=========================================================
Exception Raised!

 App:         /Applications/World of Warcraft/World of Warcraft.app
 Exception:   EXC_BAD_ACCESS
 Error Code:  0x85100086
 Time:        2008-10-29 04.37.02 EDT

 Error:       EXC_BAD_ACCESS KERN_PROTECTION_FAILURE 0x00000000
 Registers:
    eax = 0xd775510e    ebx = 0x00000000    ecx = 0xbfffe644    edx = 0xbfffe648
    edi = 0x00000002    esi = 0xd7755120    ebp = 0xbfffe668    esp = 0xbfffe5d0
     ss = 0x0000001f eflags = 0x00010202    eip = 0x00316370     cs = 0x00000017
     ds = 0x0000001f     es = 0x0000001f     fs = 0x00000000     gs = 0x00000037
 Crashed Thread: 0x0000020b

---------------------------------------------------------
Thread 0 0x0000020b
  0 0x00316370 <unknown>
  1 0x001964cf <unknown>
  2 0x00197112 <unknown>
  3 0x00197483 <unknown>
  4 0x0046f381 <unknown>
  5 0x0046f3ed <unknown>
  6 0x004948c8 <unknown>
  7 0x0049493b <unknown>
  8 0x0015f56e <unknown>
  9 0x0034ff64 <unknown>
 10 0x003541af <unknown>
 11 0x0035541b <unknown>
 12 0x00355690 <unknown>
 13 0x00012d05 <unknown>
 14 0x00003c19 <unknown>
 15 0x94975303 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1181
 16 0x9497473d SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 405
 17 0x949745a2 _SendEventToEventTargetWithOptions + 58
 18 0x949a2f14 ToolboxEventDispatcherHandler(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*) + 356
 19 0x949756bc DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 2134
 20 0x9497473d SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 405
 21 0x94991092 _SendEventToEventTarget + 52
 22 0x949fdc60 _ToolboxEventDispatcher + 86
 23 0x949fa4ba _RunApplicationEventLoop + 222
 24 0x00003d4a <unknown>
 25 0x00002a1e <unknown>
 26 0x00002945 <unknown>
 27 0x00000002 <unknown>

Thread 1 0x0000330b
  0 0x92028ca6 _sem_wait$NOCANCEL$UNIX2003 + 10
  1 0x000472b5 <unknown>
  2 0x91fdc6f5 __pthread_start + 321
  3 0x91fdc5b2 _thread_start + 34

Thread 2 0x00003707
  0 0x91fb268e ___semwait_signal + 10
  1 0x91fdd36d _pthread_cond_wait$UNIX2003 + 73
  2 0x91af9b32 _glvmDoWork + 162
  3 0x91fdc6f5 __pthread_start + 321
  4 0x91fdc5b2 _thread_start + 34

Thread 3 0x00005103
  0 0x91fab4a6 _mach_msg_trap + 10
  1 0x91fb2c9c _mach_msg + 72
  2 0x92a1968d _glcDebugListener + 349
  3 0x91fdc6f5 __pthread_start + 321
  4 0x91fdc5b2 _thread_start + 34

Thread 4 0x00006113 (Current)
  0 0x000463f6 <unknown>
  1 0x00046a5e <unknown>
  2 0x0005924d <unknown>
  3 0x00004ef7 <unknown>
  4 0x0000339a <unknown>
  5 0x0003264a <unknown>
  6 0x00320cee <unknown>
  7 0x00320c54 <unknown>
  8 0x92020ed3 _mach_msg_server + 343
  9 0x0002f4e0 <unknown>
 10 0x91fdc6f5 __pthread_start + 321
 11 0x91fdc5b2 _thread_start + 34

Thread 5 0x00006403
  0 0x91fab5c6 _mach_wait_until + 10
  1 0x920231e5 _nanosleep + 314
  2 0x920230a5 _usleep + 61
  3 0x00052c5c <unknown>
  4 0x000472b5 <unknown>
  5 0x91fdc6f5 __pthread_start + 321
  6 0x91fdc5b2 _thread_start + 34

Thread 6 0x00006503
  0 0x91fab5c6 _mach_wait_until + 10
  1 0x920231e5 _nanosleep + 314
  2 0x920230a5 _usleep + 61
  3 0x000172cd <unknown>
  4 0x000f04d4 <unknown>
  5 0x0012710f <unknown>
  6 0x001272fc <unknown>
  7 0x9418ebad -[NSThread main] + 45
  8 0x9418e754 ___NSThread__main__ + 308
  9 0x91fdc6f5 __pthread_start + 321
 10 0x91fdc5b2 _thread_start + 34

Thread 7 0x00006907
  0 0x91fab4ee _semaphore_wait_signal_trap + 10
  1 0x91fdd866 __pthread_cond_wait + 1267
  2 0x92023371 _pthread_cond_wait + 48
  3 0x0031c9af <unknown>
  4 0x00080964 <unknown>
  5 0x0012710f <unknown>
  6 0x001272fc <unknown>
  7 0x9418ebad -[NSThread main] + 45
  8 0x9418e754 ___NSThread__main__ + 308
  9 0x91fdc6f5 __pthread_start + 321
 10 0x91fdc5b2 _thread_start + 34

Thread 8 0x0000ae03
  0 0x91fab4a6 _mach_msg_trap + 10
  1 0x91fb2c9c _mach_msg + 72
  2 0x946700ce _CFRunLoopRunSpecific + 1790
  3 0x94670cf8 _CFRunLoopRunInMode + 88
  4 0x94597464 HALRunLoop::OwnThread(void*) + 160
  5 0x94597300 CAPThread::Entry(CAPThread*) + 96
  6 0x91fdc6f5 __pthread_start + 321
  7 0x91fdc5b2 _thread_start + 34

Thread 9 0x0000b307
  0 0x91fab506 _semaphore_timedwait_signal_trap + 10
  1 0x91fdd84f __pthread_cond_wait + 1244
  2 0x91fdf0d3 _pthread_cond_timedwait_relative_np + 47
  3 0x945a6a47 CAGuard::WaitFor(unsigned long long) + 213
  4 0x945a8602 CAGuard::WaitUntil(unsigned long long) + 70
  5 0x945a6da7 HP_IOThread::WorkLoop() + 759
  6 0x945a6aab HP_IOThread::ThreadEntry(HP_IOThread*) + 17
  7 0x94597300 CAPThread::Entry(CAPThread*) + 96
  8 0x91fdc6f5 __pthread_start + 321
  9 0x91fdc5b2 _thread_start + 34

Thread 10 0x0000b503
  0 0x91fab5c6 _mach_wait_until + 10
  1 0x9046dc8b _MPDelayUntil + 39
  2 0x00789efb <unknown>
  3 0x007af429 <unknown>
  4 0x91fdc6f5 __pthread_start + 321
  5 0x91fdc5b2 _thread_start + 34

Thread 11 0x0000b603
  0 0x91fab5c6 _mach_wait_until + 10
  1 0x9046dc8b _MPDelayUntil + 39
  2 0x00789efb <unknown>
  3 0x007af429 <unknown>
  4 0x91fdc6f5 __pthread_start + 321
  5 0x91fdc5b2 _thread_start + 34

Thread 12 0x0000b707
  0 0x91fab506 _semaphore_timedwait_signal_trap + 10
  1 0x91fdd84f __pthread_cond_wait + 1244
  2 0x9202889b _pthread_cond_timedwait + 47
  3 0x0031c8a9 <unknown>
  4 0x0031ea04 <unknown>
  5 0x0031eb4e <unknown>
  6 0x0012710f <unknown>
  7 0x001272fc <unknown>
  8 0x9418ebad -[NSThread main] + 45
  9 0x9418e754 ___NSThread__main__ + 308
 10 0x91fdc6f5 __pthread_start + 321
 11 0x91fdc5b2 _thread_start + 34

Thread 13 0x0000b803
  0 0x91fe31de ___select_nocancel + 10
  1 0x0031df44 <unknown>
  2 0x0031ef2c <unknown>
  3 0x0012710f <unknown>
  4 0x001272fc <unknown>
  5 0x9418ebad -[NSThread main] + 45
  6 0x9418e754 ___NSThread__main__ + 308
  7 0x91fdc6f5 __pthread_start + 321
  8 0x91fdc5b2 _thread_start + 34

Thread 14 0x0000bf07
  0 0x91fab4a6 _mach_msg_trap + 10
  1 0x91fb2c9c _mach_msg + 72
  2 0x946700ce _CFRunLoopRunSpecific + 1790
  3 0x94670cf8 _CFRunLoopRunInMode + 88
  4 0x941f2100 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 320
  5 0x9418ebad -[NSThread main] + 45
  6 0x9418e754 ___NSThread__main__ + 308
  7 0x91fdc6f5 __pthread_start + 321
  8 0x91fdc5b2 _thread_start + 34

Thread 15 0x0000c803
  0 0x92028ca6 _sem_wait$NOCANCEL$UNIX2003 + 10
  1 0x007af3f5 <unknown>
  2 0x91fdc6f5 __pthread_start + 321
  3 0x91fdc5b2 _thread_start + 34

Thread 16 0x0000c903
  0 0x92028ca6 _sem_wait$NOCANCEL$UNIX2003 + 10
  1 0x007af3f5 <unknown>
  2 0x91fdc6f5 __pthread_start + 321
  3 0x91fdc5b2 _thread_start + 34

Thread 17 0x0000ce13
  0 0x91ffb5e2 ___select + 10
  1 0x91fdc6f5 __pthread_start + 321
  2 0x91fdc5b2 _thread_start + 34

Thread 18 0x0000e203
  0 0x91fb268e ___semwait_signal + 10
  1 0x91fdd36d _pthread_cond_wait$UNIX2003 + 73
  2 0x1384b317 _gleCmdProcessor + 375
  3 0x91fdc6f5 __pthread_start + 321
  4 0x91fdc5b2 _thread_start + 34

Thread 19 0x0000cc07
  0 0x91fab4a6 _mach_msg_trap + 10
  1 0x91fb2c9c _mach_msg + 72
  2 0x946700ce _CFRunLoopRunSpecific + 1790
  3 0x94670cf8 _CFRunLoopRunInMode + 88
  4 0x922b5eca CFURLCacheWorkerThread(void*) + 396
  5 0x91fdc6f5 __pthread_start + 321
  6 0x91fdc5b2 _thread_start + 34

Thread 20 0x0000ed03
  0 0x91fab506 _semaphore_timedwait_signal_trap + 10
  1 0x91fdd84f __pthread_cond_wait + 1244
  2 0x9202889b _pthread_cond_timedwait + 47
  3 0x0031c8a9 <unknown>
  4 0x0072dcba <unknown>
  5 0x0012710f <unknown>
  6 0x001272fc <unknown>
  7 0x9418ebad -[NSThread main] + 45
  8 0x9418e754 ___NSThread__main__ + 308
  9 0x91fdc6f5 __pthread_start + 321
 10 0x91fdc5b2 _thread_start + 34

Thread 21 0x0000fc03
  0 0x92028ca6 _sem_wait$NOCANCEL$UNIX2003 + 10
  1 0x000472b5 <unknown>
  2 0x91fdc6f5 __pthread_start + 321
  3 0x91fdc5b2 _thread_start + 34

Thread 22 0x00023543
  0 0x91fab5c6 _mach_wait_until + 10
  1 0x9046dc8b _MPDelayUntil + 39
  2 0x00789efb <unknown>
  3 0x007af429 <unknown>
  4 0x91fdc6f5 __pthread_start + 321
  5 0x91fdc5b2 _thread_start + 34
_________________________________________

Other details:

Model Name:    MacBook Pro 17"
  Model Identifier:    MacBookPro2,1
  Processor Name:    Intel Core 2 Duo
  Processor Speed:    2.33 GHz
  Number Of Processors:    1
  Total Number Of Cores:    2
  L2 Cache:    4 MB
  Memory:    3 GB
  Bus Speed:    667 MHz
  Boot ROM Version:    MBP21.00A5.B08
  SMC Version:    1.14f5

ATI Radeon X1600:

  Chipset Model:    ATY,RadeonX1600
  Type:    Display
  Bus:    PCIe
  PCIe Lane Width:    x16
  VRAM (Total):    256 MB
  Vendor:    ATI (0x1002)
  Device ID:    0x71c5
  Revision ID:    0x0000
  ROM Revision:    113-xxxxxx-158
  EFI Driver Version:    01.00.158
  Displays:
Color LCD:
  Display Type:    LCD
  Resolution:    1680 x 1050
  Depth:    32-bit Color
  Built-In:    Yes
  Core Image:    Hardware Accelerated
  Main Display:    Yes
  Mirror:    Off
  Online:    Yes
  Quartz Extreme:    Supported
Display Connector:
  Status:    No display connected