Slight UI revamp to for the stable release
Twitter has updated their mobile app this afternoon, and updaters will find two sizeable changes. The first is a shot at other messaging services — photos in direct messages. Twitter has long been a popular social network, but their direct messaging options are sparse compared to alternatives. The inclusion of photos will help here, and may lure more people to use Twitter for messaging that other services.
The second change is the timeline navigation and alerts. Swiping to the left or right will move you between your stream, the Discovery section where you'll find trends and tailored content, and the Activity timeline to see what your friends are doing and who they are doing it with. The badges at the top have been changed, making unread tweets and messages more prominent, with an ability to turn on notifications for a single user by starring their profile.
The new version is in Google Play now, waiting for you to go update.