A few additional bugs I've encountered recently:
REALITY TV ISLAND
1) The rock-throwing challenge gets stuck on the spinning blue wheel of death after you take your first turn.
MYTHOLOGY ISLAND
2) After defeating Zeus, you get a blue screen that you can't close out of, forcing you to restart the game to progress.
STEAMWORKS ISLAND
3) If you fall into the water before the bridge is lowered, you don't appear to be able to get back out.
4) When you try to pour chemicals into the dirty beaker, it doesn't hold them; they just fall through it. This bug renders the island uncompletable.