Why do Flickr photos appear with a lock icon on top of them?
Geophoto displays a lock icon on top of items that it can’t modify or update with new location information. If you are viewing a photo posted on Flickr by another user, you do not have the ability to change its geotags – therefore, Geophoto will display a lock icon on top of it. If you are viewing your own photos on Flickr, you need to authorize Geophoto to communicate with Flickr (in the Flickr pane of Geophoto’s Preferences window) before you can update the original photo with the new location information.