Lots of people report it. No one knows how to fix it. For some users
removing and re-adding the Outlook Address Book Service and repairing the
PST file will fix it. For most, nothing fixes it.

Signature
Russ Valentine
[MVP-Outlook]
> When scrolling down the list of contacts, Outlook will
> quit running - no errors about half way through the list.
> Has anyone had this happen before?