Resolution: Works As Intended
Affects Version/s: Snapshot 13w01b, Snapshot 13w02a, Snapshot 13w02b, Snapshot 13w03a, Snapshot 13w04a, Snapshot 13w05a, Snapshot 13w05b, Snapshot 13w06a, Snapshot 13w07a, Snapshot 13w09a, Snapshot 13w09b, Snapshot 13w09c, Snapshot 13w10a, Snapshot 13w10b, Minecraft 1.5, Snapshot 13w11a, Minecraft 1.5.1, Snapshot 13w16a, Snapshot 13w16b, Minecraft 1.5.2, Snapshot 13w17a, Minecraft 1.6.2, Minecraft 1.7.4, Minecraft 14w05b, Minecraft 14w06b, Minecraft 14w07a
Fix Version/s: None
Mobs that use projectiles as their weapon, such as Skeletons and Withers, cannot deal damage to the Ender Dragon but projectiles fired by a player does deal damage, such as an arrow.
Steps to Reproduce:
1. Make a new Creative world.
2. Construct an End Portal and enter it.
3. Spawn a Wither.
4. It may be difficult, but get the Wither to chase the Ender Dragon.
5. Notice that when a Wither Skull manages to directly hit the Ender Dragon, no damage is dealt. Sometimes, only the explosion damage is dealt.