Do I need to do anything special if I dupe an event record in FileMaker?
Yes. If the event has already been seen by iCal it will have a ID in the field zulu_UUID. These IDs look like this...
...and are what iCal uses to distinguish one event from another. If you dupe a record that has one of these you'll want to clear the UUID in your dupe script or iCal will never see the new record (never see the second instance of the same UUID).
We have auto-enter data turned on for this field with nothing (blankness) in the data field so that when a record is duped there will be nothing here. You'll want to leave this in place, OR to script our duplicate routines to clear this field.