Same thing happens on my machine OFTEN. I can email you the entire crash report, just let me know where to send it.... very easy for me to reproduce.
tim
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Date/Time: 2007-01-22 23:43:15.578 -0600
OS Version: 10.4.8 (Build 8L2127)
Report Version: 4
Command: Parallels
Path: /Applications/Parallels/Parallels Desktop.app/Contents/MacOS/Parallels
Parent: WindowServer [62]
Version: 2.5 (2.5 Build 3120.0)
PID: 985
Thread: 0
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000010
Thread 0 Crashed:
0 com.apple.HIToolbox 0x92e04f39 HIObjectIsAccessibilityIgnored + 9
1 com.apple.HIToolbox 0x92e04e9c AXNotificationAXUIElementNotifyForAXUIElement + 44
2 com.apple.HIToolbox 0x92e04e55 AXNotificationHIObjectNotifyForObject + 97
3 com.apple.HIToolbox 0x92e04de0 AXNotificationHIObjectNotify + 50
4 com.parallels.desktop 0x0049d564 0x1000 + 4834660
5 com.parallels.desktop 0x003106f4 0x1000 + 3208948
6 com.parallels.desktop 0x002d7bc0 0x1000 + 2976704
7 com.parallels.desktop 0x0037d70a 0x1000 + 3655434
8 com.apple.HIToolbox 0x92dcc7eb DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1093
9 com.apple.HIToolbox 0x92dcbe90 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 304
10 com.apple.HIToolbox 0x92dcbd55 SendEventToEventTargetWithOptions + 55
11 com.apple.HIToolbox 0x92e14304 PostActivateEvent + 344
12 com.apple.HIToolbox 0x92e134e7 HiliteAndActivateWindow + 409
13 com.apple.HIToolbox 0x92e132af AdjustToNewWindowActivation(WindowData*, WindowContext*, OpaqueWindowPtr*, WindowData*) + 217
14 com.apple.HIToolbox 0x92e1568b PotentiallyAdjustToNewWindowActivation(WindowData*, WindowData*, WindowContext*, OpaqueWindowPtr*, WindowData*) + 111
15 com.apple.HIToolbox 0x92e14f93 BringToFrontAndActivateWindow(WindowData*, OpaqueWindowGroupRef*, unsigned char) + 133
16 com.apple.HIToolbox 0x92e1499c SelectWindow + 258
17 com.parallels.desktop 0x003196a9 0x1000 + 3245737
18 com.parallels.desktop 0x0037adea 0x1000 + 3644906
19 com.apple.HIToolbox 0x92dcc7eb DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1093
20 com.apple.HIToolbox 0x92dcbe90 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 304
21 com.apple.HIToolbox 0x92dcbd55 SendEventToEventTargetWithOptions + 55
22 com.apple.HIToolbox 0x92dd325d ToolboxEventDispatcherHandler(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*) + 357
23 com.apple.HIToolbox 0x92dccba2 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 2044
24 com.apple.HIToolbox 0x92dcbe90 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 304
25 com.apple.HIToolbox 0x92dd30f0 SendEventToEventTarget + 56
26 com.parallels.desktop 0x0037520a 0x1000 + 3621386
27 com.parallels.desktop 0x0053be41 0x1000 + 5484097
28 com.parallels.desktop 0x004d151b 0x1000 + 5047579
29 com.parallels.desktop 0x004d1634 0x1000 + 5047860
30 com.parallels.desktop 0x002f2fdd 0x1000 + 3088349
31 com.parallels.desktop 0x00040efd 0x1000 + 261885
32 com.parallels.desktop 0x00006792 0x1000 + 22418
33 com.parallels.desktop 0x000066b9 0x1000 + 22201