"Some of these aftermarket batteries are not equipped with internal protective devices to guard against overcharging, internal heating and short circuit. If these aftermarket battery packs were used, it could lead to an accident causing damage to your camera or personal injury."
So they issued a firmware update to "detect these aftermarket 3rd party batteries so such serious safety issues can be avoided." Panasonic then warn the user
"After this firmware update your Panasonic Digital Camera cannot be operated by 3rd party batteries (non genuine Panasonic batteries)."
This smells like Panasonic are locking their customers into (expensive) original Panasonic batteries using DRM techniques. Or is it really a safety issue?