Delete duplicate records?

Is there an easy way to delete duplicate records in a ToDo list? Or even an address book?

I am working on a project where the two copies are synch’d at 53,000 records. Starting over is not an option.

Subject: Delete duplicate records?

Sure. Create a view based on the created date. If you know the date/time that the synch occurred, you can just delete all those documents in the view.