When Maria storms into the toilets to confront Steph about applying for the management job behind her back, her necklace is outside her collar, but later in the scene the necklace is tucked underneath her uniform.
Christopher is standing outside his service car and signing an autograph for a fan. She is only seen saying "Can I get your autograph?" And which he responds "Amber? Is-What's your name?" They both laugh and she says "Amber". She never mentions the name before he somehow new it. This is clearly a blooper.
The hotel manager enters the lift with Chris, Marisa and Ty but by the end of the scene, the manager does not seem to have had an opportunity to leave politely, but is nonetheless no longer there. If viewed in "Anamorphic" widescreen (2.40:1), at about 31:40 minutes, at the very right edge of the screen after the elevator bell dings, you can see part of the manager's (John Bextrum's) back, leaving the elevator just before the French lady in the black hat crosses in front of the camera. After all, he was the last person into the lift, and the closest one to the door, so he would be the first person to exit as well.
When Chris, Marisa and Ty go for a walk in the park, they leave with the dog but in two subsequent scenes (penguin enclosure and hill side), the dog no longer appears to be with them. This is because Rufus was left with the dog walker sent by Jerry at approximately minute 34:15. At around 36:50, when Marisa realizes that she forgot Ty after she left the bench because of the paparazzi, and in the subsequent few seconds, you can see Ty leaving Rufus with the dog walker in the background.