When Kris is hiding in the closet as Little Bo Peep, position of her cane keeps reversing from close-up shot vs. the shot from the room.
When Kelly is trapped in the flames, she is briefly seen walking and coughing in the passageway as Kris runs through the flames under the cloth. When Kris reaches Kelly, she is sitting with her back against the bulkhead.
When Kris is reading the mysterious note about Lisa Blake's death, what the audience sees on-screen and what Kris is reading don't match.
Kris taps on the "bottom" of the trunk as if to check for a secret space, but the the upper compartment is so shallow and loosely fitted in relation to the outer casing that anyone could tell by looking there was more.