Affects Version/s: 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
Upon noticing a mob it normally kills or a player, Withers will become "stuck" if there are blocks where its flying height is. However, it will be able to break through if it becomes damaged.
Steps to Reproduce:
1. Make a new Creative world
2. Create the structure show in the pictures and spawn pigs in it.
3. Spawn a Wither far enough from the structure so that it will not get destroyed.
4. Observe how the Wither continually pushes its self in to the blocks.
There are many different ways to trigger this, I just decided to do it this way.