I'm in the same boat as Pedro250 I think. Updated from 10.0 to 12.0.1 via daybreak on the lastest atmosphere for the new Pokemon Snap game. Got the new game to run and all my old ones too. Except for animal crossing. Refuses to start even after erasing the game and reinstalling it. I even downloaded the game and updates from a new source, no luck. Using latest sigpatches from ITotalJustice.