Placing a button on the ground will fail and autmatically place it as if it were on the bottom of a block

If spawn Lava Oceans is set to true, you can spawn in them and be completely unable to escape because you keep dying

Items thrown in cauldrons bounce out and sometimes go super crazy

Whenever there is an upside down staircase that is inverted (That is, 7/8 of the full block is there except for one of the bottom corners), the area that is not filled in (the other 1/8) is always darkened.