Continuity: Water in the pool becomes instantly still after the old men get out of it the first time.
Revealing mistakes: Rose visibly swallows after she dies.
Audio/visual unsynchronized: When people are commenting on the old people's dancing.
Audio/visual unsynchronized: As Ben starts his car it makes the distinct sound of an older Chrysler when he's driving a Cadillac.
Continuity: David's hairstyle changes when he goes with his Grandpa to the eye doctor.
Revealing mistakes: Obvious stunt double for David when he jumps from the jetty to the boat.
Revealing mistakes: Obvious stunt double when Arthur Selwyn is break dancing.
Continuity: When the four men are hiding in the pool closet and the Anterians come into to put the day's haul of cocoons into the pool, the tile floor is completely dry, though the men had just exited the pool moments before, dripping wet.
Continuity: Kitty massages Jack's right leg just after he bangs it. However, when they are talking the leg left is the injured one.
Continuity: The sweets Jack drops to the floor vanish.
Audio/visual unsynchronized: When Joe, Bernie, and Art are in the dining room, the piano player's movements don't come close to matching the music being played.
Errors made by characters (possibly deliberate errors by the filmmakers): When Bernard Lefkowitz is arguing with the other about visiting the "lifepool", he states that Dutch Shultz visited his store in 1945. Dutch Shultz was shot and killed in his makeshift headquarters in 1935.