Today MacFixIt carries one of those gut-wrenching horror stories from a reader that you read about from time to time:

Tonight, while cleaning up my address book to sync to the blackberry, I got the spinning ball of death, which resulted in having to restart the computer. When I did, address book was empty the next time I opened it. Database gone. Backup database gone.

Not long ago, a Hawk Wings reader experienced something similar after syncing his PowerBook with a Nokia 6682. Although he enjoyed the added bonus of a very puzzling exchange with Apple Tech Support following his wipe-out.

Of course, prevention is the best cure. That is to say, you can’t really lose what you have backed up. Back up your ~/Library/Application Support/AddressBook folder often.

However, if you find yourself in a jam and the backup is not as up-to-date as it might be, there is still hope.

Address Book is smart. It keeps a little backup of its own in a AddressBook.data.previous file inside the directory mentioned above:

To restore it, all you need to do is quit Address Book, delete the dead AddressBook.data file and rename the backup to AddressBook.data. Whew!