Almost identical to the previous original Motorola Cliq trial update that we saw a while back, this update will be seeded to a lucky few prior to a general release. With some nice highlights, it might be worth heading over to the official T-Mobile forums and subscribing to this thread in order to try to partake and be a part of the trial period. With improved overall phone performance, visual voicemail enhancements, Bluetooth audio improvements, camera corrections, screen and display performance enhancements, text messaging improvements and touch screen enhancements update, 1.31.43 looks to be quite the bug fix.
Remember, this is a trial update for only 1,000 people right now. Those not selected will receive their updates with the general public at a date to be determined!