OSM Map Problems 
Currently CacheTrack isn't able to download OSM Maps. That's because all the servers than can be used for downloading the map data (XAPI servers) are not working.
Hope we soon see the servers up and running again. That means you are currently bound to the Google Maps images you can download right on the phone.
For more information on the status of the OpenStreetMap servers see
http://wiki.openstreetmap.org/wiki/Platform_Status