Ground glitch - this will let you fall through the ground, and back to your boat, at the front of the island
Elf house glitch - At the house at Forest of the Elves on the inside, if you put a block where someone is standing, that sim will go to the back of the house while the other houses sims go to the front.
Sit glitch - If you jump when you press sit on a chair, your sim gets on the chair, they will shake, not sit still.
Organ glitch - when an organ is sitting of the corner of a block, sims will still play like of its on the ground.
Friendship level glitch - When you finish all of of one sims tasks, the friendship level would not go up all the way.