Insane stuttering when playing on multiplayer servers

Invalid item entities without actual items exist.

Console Spam involving Generation of Crash Report. [Negative index in crash report handler (0/10)]

Exception when generating chunk when creating world with one layer. (Caused by not enough heap space)

Zombies can tick themselves

Sheep no longer spawn in chunks and worlds made in 1.9 and after.

Weapon cooldown on pickaxes is offset with linear functions

Crash After Death

Villagers run toward Zombies when they are breaking doors.

klijo,iloh Mobs can spin around

Chat immediately exits upon death.

Mobs continue to attack player when a villager closes door

Ignore.

Unable to attack mobs through closed doors, though there are holes in them.

LWJGL crashes with too much memory.

Player can't open door at night

Player takes void damage to quickly.