One of John Gruber's little birdies has informed him that the part of consolidated.db, the database that stores iOS device location data and syncs it to iTunes, that keeps a record of those locations is actually a bug.
consolidated.db acts as a cache for location data, and that historical data should be getting culled but isn’t, either due to a bug or, more likely, an oversight. I.e. someone wrote the code to cache location data but never wrote code to cull non-recent entries from the cache, so that a database that’s meant to serve as a cache of your recent location data is instead a persistent log of your location history. I’d wager this gets fixed in the next iOS update.
