Twitter has released an update for the TweetDeck on Mac application.  This update (2.3.1) has more than 90 fixes and feature upgrades.

Twitter’s TweetDeck for Mac application

There are many major changes coming with this free update, but one of the main ones, is a new feature that allows a tweet to be embedded into another Tweet.

Other than that, Twitter is also increasing performance for “multiple high-velocity columns” which I am guessing means they are going to make sure that performance on columns that get a lot of traffic will be optimized.