Recommended from online: Go into Settings----->Accounts and Sync---->Tap Google----->Uncheck "Sync Picasa Web Albums". Go into Settings----->Application Manager---->"All" tab----->Find Gallery and tap "Clear Data" I think your next step is going into the gallery app and tapping clear data. I believe it will only delete the cache and not your pictures.
Tips: Improving phone GPS performance Turn phone off/on Turn location services off/on Perform a GPS reset: 1. Double tap the home button. This will bring up tile sized images of all currently running apps. Swipe the screens of all apps upwards to close them. 2. Then go into settings and turn on airplane mode. 3. When you've done that go to settings, general, reset and choose reset network settings (you will need to re-enter your wifi passwords!) 4. Once your phone has reset go to settings, location services, turn it off then on again. 5. Then go settings > privacy > location services > system services, setting time zone OFF.