When I punch a mob it takes a while for it to react. This happens on a world that i created in 1.5. so I was hoping I could play the world... but I can't because all the mobs are terrible! I have tested it on
-Zombie
-Skeleton
-Pig
-Sheep
-Zombie Pigman
-Ghast
Please Fix!
Your game is lagging, assign more memory with the launcher.