Followers, pets, and summoned creatures will no longer attack enemies that are in an idle state unless the player is within 10 yards of the enemy.
This is a bit of a bummer. My wizard likes deploying Hydra up ahead to scout for monsters. Does the nerf apply to this skill, or only to other followers/pets? This was a fun part of my battle tactics and now I have to walk right up to 'em to get 'em with Hydra?