App Update: Strange Things Going on at Twitter; iPad Version Updated

Strange things are going on over at Twitter these days and that seems to be reflected in their app updates. Why not release an update for the iPad version in the middle of iPhone 5 mania?
This update adds profile page header images. That seems familiar, where have I seen that before? The update also removes the sliding page interface that this app actually originated when it was called Tweetie.
Someone please check Twitter HQ's water supply for contaminants.