Twitter has been updated and includes enhancements to search and other improvements as quoted by twitter as below –

– As you search you’ll see more topic and user suggestions for your query, based on what’s happening in real time. You’ll also see these suggestions when adding a hashtag or username as you compose a new Tweet.

– Top Tweets from big moments in the past pop out when you search for a given term. For example, searching for “election” might highlight Tweets from several months ago.

– When you open a web page you can now see the related Tweet for more context. Just pull the tray icon up or down to see or hide the Tweet.

– It’s easier to see long conversations in the Tweet details view, which now shows all of the replies to any Tweet

– When you block a user in the app, their Tweets will instantly disappear from the Connect tab in the app

– Pull-to-refresh in Discover shows a new, smoother animation

– Support for traditional Chinese

– Logout support (iOS 6 only)

– Uploading videos vie Mobypicture, Vodpod and Posterous is no longer supported

The last change is another example of twitter taking control and cutting third party services.