using /blockdata command to set dispenser to have tnt amount to negative value will fire 1 tnt and set the item count to 0

slime block bug in 14w26c

block update detector (like in picture 1 sometimes disapear)

if you open chest while you in nether portal chest will display open animation only but it not show inventory

you can fall through extend piston if it extend to west and you walk west to east

light bug