not geocoding locations that already exist

I have content that is using the Location CCK on the node. I setup geocoding after much of the nodes had been added. When I save the nodes that already exist it does not geocode the location. Only if I delete the location, save, and then re-add the location data will it geocode.

I think this is a bug. It seems it should be geocoding the location on every save, or at least first check if lat & lng are 0.000000 and if so then geocode.

I have a lot of nodes with locations that need geocoded.