Note: If you are updating from 6.x-1.0-alpha1 you will most likely have to re set up any sort options for your tablesorter views.
Also the libraries module is now a requirement and you will need to download the tablesorter jQuery plugin to the sites/all/libraries directory on your site. Instructions are in the readme.
Development version for views tablesorter; contains fixes since the most recent version, plus possibly experimental code. You may use this with caution.