There was an update made available sometime yesterday. The update could have been in preparation for the Mario Kart 7 update, seeing as how it didn't do too much. The only reports I'm finding is that the update did stop most flash carts from working with the 3DS. To get the Mario Kart 7 update head on over the eShop. Mario Kart 7 will NOT let you access the online multiplayer option until you do update.