I just updated a few sites to 3.1 and I've run into two issues:
1. When I update the plugin and navigate back to the plugins page, I receive a message stating that the plugin has been deactivated due to a missing file (master.php). When I reactive the plugin, it works.
2. The CSS styling is a bit different on this one. I'm having issues adding widths or padding to the icons via an i class with this version.
Just wanted to see if anyone else knew of these issues. Still an awesome plugin though!