Minecraft wiki entry for Development_versions, associated text: MC-7619 – If a minecart with hopper falls into the Void, the game will crash.
MC-7627 – Changing the texture pack in game renders strange.
MC-7663 – Hopper minecart behaves like they are on powered activator rail if they never touched one.
MC-7668 – Using pick block on Minecart with TNT or hopper gives you just a minecart.
MC-7940 – Wrong death message of renamed mobs spawned by dispensers.
MC-8042 – Minecart with hopper is not placed on rail.