Lion's Runaway Address Book Issue

Lion's Address Book now uses CardDAV instead of the previous structure. As such, the OS needed to perform a conversion on my AB data. Occasionally, the conversion burped on a record. (My word, not Apple's.) This caused the AddressBookSourceSync process to become a runaway application. The solution was to:

- Export all contacts to a vCard file for safe keeping.

- Delete Library --> Application Support --> Address Book.

- Reboot.

- Open System Preferences --> iCloud. Enable Contact Syncing.

- Click on Merge Data.

This caused the system to sync with my iCloud account. It did. It took just a minute or two. All of my contacts appeared in AB.