BB Curve :: 9300 - Outlook Contact Sync / Unknown Error

We recently upgraded my wife's Blackberry to a Curve 3G 9330. When we try to sync to Outlook (non-Exchange), we encounter an error with the contacts (address book). The Desktop Software simply indicates an "unknown error" - not particularly facilitate. We've narrowed it down to a potentially bad contact record on the Blackberry, but cannot find a way to delete it. The options menu will not come up on the Blackberry for this one record. We've try to sync the device by overwriting the contacts with new data from Outlook, but still get's the same error message. I cannot find any information on erasing/deleting the complete contact list on the Blackberry.