This seemed to fix most of the FN locking up problems but not all. Whenever I go to change the spacebar RGB LED's to one of the saved profiles it still locks up except mine doesn't seem to come back. It just resets with the usb disconnecting sound every 10 seconds or so, but I have to unplug it and plug it back in to fix it. This seems to be the only thing that I have found that makes it lock up after the firmware update.