Not me, I have a 3GS... try rebooting your phone. When you don't want it to broadcast your location, close the app (aka hit the home button to go to the home screen. Double click the home button so there are 4 apps that show up on the bottom. Hold down the app until they start shaking and the red minus shows up. Hit the minus, hit the home button). This also should free up the resources it may be using on your phone.
Yeah to free up resources I have sbsetting thank you. Might be a conflict with another app. I'll try downloading it again.