APPCRASH fauly module MIMEDIR.dll

[EmmaM]

I ahve not installed anything new or donw anything, this morning after
launching outlook it crashes every time with the following error:

Problem Event Name: APPCRASH
Application Name: OUTLOOK.EXE
Application Version: 11.0.8169.0
Application Timestamp: 465f28e3
Fault Module Name: MIMEDIR.DLL
Fault Module Version: 11.0.8164.0
Fault Module Timestamp: 4627ac41
Exception Code: c0000005
Exception Offset: 00019a9e
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 2057

Additional information about the problem:
LCID: 1033
Brand: Office11Crash
skulcid: 1033

I am running vista SP1

Any advice or hotfixes I can download?
Thanks.