This thread has probably been started somewhere... I'm too lazy to go looking for it. I've noticed that some dungeons have walls in the middle of where there is obviously nothing to have a wall for. An example is the hallway in IC1 [Illusion Castle Underground] where harpies begins. Another example is in FC [Frozen Clue] in the middle of some of their ice circles where you fight most of the mobs. Both are extremely annoying as the one in FC likes to stop combos for no reason. There are other invisible walls that I currently can't remember.