You have to have the latest version of the Logitech Gaming Software installed for the new features to work correctly. It requires at least version 8.94.86, and trying to update automatically through the "check for updates" link in the LGS does not find the latest update right now - I had to go to the Logitech website and search for drivers for my G510.

The only features I've seen of this new update so far is when I take aggro, the keyboard back lighting flashes red for a few seconds, but I really wish it wouldn't dim the back lighting so much for all the rest of the time...