When General Pusch is coming down the stairs, he's wearing glasses. But in the next shot, where he is standing next to the reception, the glasses have been gone.
When Krüglein is checking into the hotel a boy is shooting a sucker arrow on his head and is aiming on his hair, but in the next shot the arrow is stuck to his the part of his forehead.
When the guests are driving away and Leopold is holding his hand to receive a tip, a leaf is falling on his hand. But a thread is seen attached to the leaf.
When Theo Frobenius is opening the telegram to read it, he is holding it directly into the camera in the first shot.
Before setting the hotel on smoke Andy is holding his watch directly into the camera instead of looking at it himself.
When Robby, disguised as Jack Neuhaus, is improvising a route from the hotel to Fukishima to the General he is mentioning Fu Man Chu in Japan. But this is actually a Chinese character from books by Sax Rohmer.