Thanks for reporting this issue. It appears a small number of our users are experiencing this issue running the latest version of PocketEarth on iOS 6, but we have so far been unable to reproduce or identify the problem. Though we are investigating this issue and hope to have it corrected soon. Sorry for any inconvenience!
Please note that for the meantime, you should still be able to locate places on the map, and tap on them to see their Info Panel. You can tap the Star on the place’s Info Panel to add it to the My Destinations list so you can quickly re-find it later, and to be given the option to download the maps for that place.
You may also try rebooting the device or reinstalling the app (if you don’t mind loosing your favorites and saved data).
Thanks again for reporting this and for your patience while we correct it!