From the blog "Featured News"

Happy new year!  We released a change this week that hopefully will help fight the winter blues. Uplift has been an ongoing adventure for a number of engineering teams, but the goal of improving the SL experience for all residents has not changed. Uplift brought in new hardware and the ability to reconfigure it quickly to react to changing circumstances. A few months ago, we quietly changed hardware configurations to provide better performance for the simulators, but our job was not do