It features the new Foursquare 2.0 API which means much less data usage and (hopefully) faster check-ins.
Here are the complete changes made:
- Friend database performance rewrite
- Date formatting fixes
- Updated Facebook profile pics now change in app
- Show full sized user profile pics in app (click on avatar on user screen)
- Transition to Foursquare API version 2.0 (this means less data usage)
Check your Market app.