iAd Producer 3: MapView region may not have correct centerpoint

Trying to set the visible region on a map might not establish a correct centerpoint. This depends on a combination of: The size of the MapView in use (pixels wide by pixels tall) The requested visible region When this issue occurs, the requested visible region's longitudeDelta is larger than what can be displayed by the map in use. This maximum longitudeDelta will change depending on what section of geography is in the region.