Windows 8 64 bit
Java 1.8.0_60 32 bit
CPU: 2x Intel(R) Celeron(R) CPU N2840 @ 2.16GHz
Display: 1366x705 (Intel)
Intel(R) HD Graphics
4.0.0 - Build 10.18.10.3408
So, I was just testing out the cool snapshot 15w41b, I began by testing out the Skeletons' new AI, at first when I went into survival mode, a skeleton fired at another skeleton by accident and so they began fighting. One of them won so I just moved on and saw another skeleton with some zombies. I killed those zombies and the skeleton was just gazing away in the distance, with his bow in the snapshot below. When I tried to push him, he pushed me back and stood in that same spot.
MC-89923 No AI Mobs from Natural Mob Spawners