App keeps crashing after last update

I love this app and use it daily!! since the most recent update 4.1.1, I keep getting an error message "check-in failed. Try again?" When I try again its the same error message. Even if I chose a different location to check in at

PLEASE FIX THIS ASAP

Janos Mommy about Foursquare Swarm: Check-in App, v4.1.1