I've also been seeing this same error - I too have MSN desktop search and Avast! running together - it's been driving me mad, everytime an email is moved Outlook crashes. My Outlook version number is reported as being slightly higher, but the error is the same:
Faulting application outlook.exe, version 11.0.6565.0, stamp 42cacc7d, faulting module oleaut32.dll, version 5.1.2600.2180, stamp 411096f3, debug? 0, fault address 0x00004ba4.
I have tried switching off desktop search whilst Outlook is open - it certainly seems to stop the problem, so it's definetely an incompatability issue somewhere!