When Cody falls from the porthole, two glasses are on the floor. But later when they run after the paparazzi the glasses are gone.
At the beginning, Zack and Cody skate in the lobby and push a guy with a golf bag. It falls and spills the golf clubs onto the floor. A big guy trips on it and falls over Mr. Moseby, and after that the golf bag is not to seen.
Zack and Cody give all their candy for a camera. They put it all on the table, but when they get the camera, all the candy has suddenly gone from the table with no one taking it.
When London and Zack are crawling in the vent she is on the right (our left) but when they open the vent she is on the left (our right).
When Carey opens the suite door to find Moseby with the hotel bill, then when the room service arrives and in the following shots, the twins' backpacks' straps are on, then off, then on, then off and so forth.
When London tries to lower Zack from the vent into the ballroom, you can clearly see he falls onto a black mat.
When Maddie gives Zack and Cody the "US People" magazine, you can clearly see the studio light reflecting on it.
At the beginning, after the big guy falls over Mr. Moseby and everybody looks at them, you can see studio lights in Zack and Cody's helmets.
When we hear the classic song, if you look closely at the door windows, you can see a studio light.