probably because leads can be unattached from fenceposts and the code is not checking if it's really there... or something else
This happens when a player or mob is in any vehicle and in view. When you turn around and the player/mob is not in view, hand is normal, turn back and hand imitates mob/player.
name it "Dinnerbone" or "Grum" both work, I've heard it's an "easter egg".
they go towards an air block with some specific condition it seems, I had air block with vines, youtube vid: http://www.youtube.com/watch?v=XWvHV0gz9fE
Yup, what Bob Joe Eisenhower said, oh and both fences, regular and nether brick
From more world options. When it's open it shows as if they are not on.
I think he means this: http://youtu.be/25w3I2S5Buc?t=9m3s
Yes it is, example: Docm77 video: http://www.youtube.com/watch?v=OVY2Kor9GoA&t=13m10s and more throughout the video