I downloaded this app from the Stanford ios course, and I have my own flickr api key, and put it in FlickrAPIKey.h, but it still gives me an empty photographer tableView. I'm not sure if it is related or not, but I got those log messages:
2012-03-11 09:18:46.848 Photomania[23748:1e03] NSFileCoordinator: A surprising server error was signaled. Details: Connection invalid
@litov Yes, you can indeed do that, although in situations like this I find it much easier to just delete the App from the iPhone/iPad or the simulator; the database file will then get deleted as well.