With the new version of TweetDeck, Twitter ruined an 'industry standard' piece of software. Overnight, a product that had slowly evolved into the go-to Twitter client for everyone became a stripped down, unintuitive nightmare that raised your blood pressure at least three times a day.
Gone were useful things like decent list management, in-column profile searches and a decent way to see threaded conversations. Instead you were forced to battle with an interface that seemed to have been written to put you off using Twitter altogether.
The news for mobile users was bad too - the Twitter iPhone app went the same way, eschewing usability for confusion and reliability for network errors.
Not to worry, help is at hand. If you've got an iPhone, Tweetbot is wonderful. And if you'd like to revert to the old version of TweetDeck, just click here and install it. It's good to be back.
(Thanks to @danstweet for finding that link and making my life easier!)