Hi everybody,
after upgrading from Office 2003 to Office 2007, Outlook (with ZCO version 6.0.11_GA_2855_6.0.6097.11) stopped working: it crashes at startup, even if I start it in safe mode.
Here is some data from the crash dump stored in zco-cores folder:

Code:
FAULTING_IP: 
OLMAPI32+a1fa
38eea1fa ff5108          call    dword ptr [ecx+8]

EXCEPTION_RECORD:  ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 38eea1fa (OLMAPI32+0x0000a1fa)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 00000000
   Parameter[1]: 00000008
Attempt to read from address 00000008

PROCESS_NAME:  OUTLOOK.EXE

ERROR_CODE: (NTSTATUS) 0xc0000005

EXCEPTION_CODE: (NTSTATUS) 0xc0000005

EXCEPTION_PARAMETER1:  00000000

EXCEPTION_PARAMETER2:  00000008

READ_ADDRESS:  00000008 

FOLLOWUP_IP: 
OLMAPI32+a1fa
38eea1fa ff5108          call    dword ptr [ecx+8]

FAULTING_THREAD:  00000c64

BUGCHECK_STR:  APPLICATION_FAULT_NULL_CLASS_PTR_DEREFERENCE_NULL_POINTER_READ_INVALID_POINTER_READ_CALL

PRIMARY_PROBLEM_CLASS:  NULL_CLASS_PTR_DEREFERENCE_CALL

DEFAULT_BUCKET_ID:  NULL_CLASS_PTR_DEREFERENCE_CALL

LAST_CONTROL_TRANSFER:  from 38f308a7 to 38eea1fa

STACK_TEXT:  
WARNING: Stack unwind information not available. Following frames may be wrong.
0463fb60 38f308a7 02223bd8 00000122 00000000 OLMAPI32+0xa1fa
0463fbdc 38f30450 0463fbf4 06884cc0 06884cec OLMAPI32+0x508a7
0463fc64 38f302c8 022234c8 00000000 00000122 OLMAPI32+0x50450
0463fc9c 300ff022 06884cec 00000000 00000122 OLMAPI32+0x502c8
0463fcc0 300c917b 0148a5b8 00000000 00000122 OUTLOOK+0xff022
0463fd1c 300d3fe9 00000000 00000000 00000122 OUTLOOK+0xc917b
0463fd4c 300fbcb3 014863c4 0463fd88 03db3b40 OUTLOOK+0xd3fe9
0463fd80 300de3ef 00000000 0463fd98 00000000 OUTLOOK+0xfbcb3
0463fd9c 300de78a 014863e8 00000006 00010000 OUTLOOK+0xde3ef
0463fdd0 300fec9a 014863c4 00000006 00010000 OUTLOOK+0xde78a
0463fe08 300feb1f 0463fea4 0463fe94 0463ff04 OUTLOOK+0xfec9a
0463feb0 300fea3c 00000000 0463fed8 00000000 OUTLOOK+0xfeb1f
0463fee4 30101743 0463ff04 00000000 00a86000 OUTLOOK+0xfea3c
0463ff08 300fbc90 00000001 06bab804 300f9572 OUTLOOK+0x101743
0463ff38 3010352c 06bab804 00a66754 301025bb OUTLOOK+0xfbc90
0463ff5c 300feffb 0463ff78 38f43cbd 00a66754 OUTLOOK+0x10352c
0463ff64 38f43cbd 00a66754 014813ec 014813c0 OUTLOOK+0xfeffb
0463ff78 32613a2e 06881430 06571480 00090008 OLMAPI32+0x63cbd
0463ffac 32613903 0463ffec 7c80b729 014813c0 MSO+0x13a2e
0463ffb4 7c80b729 014813c0 00090008 0013f2b8 MSO+0x13903
0463ffec 00000000 326138f8 014813c0 00000000 kernel32!BaseThreadStart+0x37


STACK_COMMAND:  ~6s; .ecxr ; kb

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  OLMAPI32+a1fa

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: OLMAPI32

IMAGE_NAME:  OLMAPI32.DLL

DEBUG_FLR_IMAGE_TIMESTAMP:  4e2f95e8

FAILURE_BUCKET_ID:  NULL_CLASS_PTR_DEREFERENCE_CALL_c0000005_OLMAPI32.DLL!Unknown

BUCKET_ID:  APPLICATION_FAULT_NULL_CLASS_PTR_DEREFERENCE_NULL_POINTER_READ_INVALID_POINTER_READ_CALL_OLMAPI32+a1fa

WATSON_STAGEONE_URL:  http://watson.microsoft.com/StageOne/OUTLOOK_EXE/12_0_6607_1000/4e398dcd/OLMAPI32_DLL/12_0_6606_1000/4e2f95e8/c0000005/0000a1fa.htm?Retriage=1

Followup: MachineOwner
It seems an error related to olmapi32.dll: we tried to delete that file and then perform an Office repair (to create a new olmapi32.dll file) but the problem persists.

This problem appears only where we upgraded from 2003 to 2007: in the PCs where we installed Office 2007 directly there are no problems, but in most PCs we can't uninstall the 2003 version and then install 2007, we are forced to perform the upgrade.
Do you have any clue?
Thank you in advance.