During the recreation of the "King of the World" scene from Titanic, the boat is supposed to be moving but rarely progresses beyond the Sydney Opera House.
In the kitchen scene when Margaret makes Ben try Australian coffee, the number of buttons done up on her blouse keeps changing back and forth between shots.
After Bea and Ben swim to the boat and get on it, they dry out much too quickly.
At 56:13 when Ben and Margaret are on the boat chatting at the bar, Margaret's glass is half empty and when the camera angle changes it's full.
When Ben slams the exes coffee before rushing off to Bea, he hands him back the cup, the it's gone and he only holding the saucer... the it's back.
The hand prints on the glass cabinet door are not backwards; they were made by Bea's hands flipped outwards when her hands are pressed against the glass.
In the airplane scene, the economy class was filmed in a wide body aircraft but the business class is narrow body.
Claudia mispronounces Martin Scorsese's last name as "skor-SEES-ee" rather than "skor-SESS-ee". However, this is only a goof, if it is an error that the character would not have made.
Bea and Ben meet because Bea says she desperately has to pee and Ben helps her get the key to the coffee shop restroom. She is never shown peeing/preparing to pee. However, it seems as if the actual intent is that the camera only joins her in the washroom after she has finished peeing, she is first shown refastening her pants afterwards. The toilet can be heard flushing as the scene opens.
When Bea is shown on the flight to Australia, she is sitting in economy of a wide-body plane with 2 aisles. However, when she sees Ben in business class, the plane only has 1 aisle, as a narrow body plane would have.
One hour and 30 mins into movie, have a look at the green coffee cup, its there then not and then its there.
Having been filmed in Sydney, at the start of the film when Bea is standing on the street outside Ben's place, you can see cars closer to her parked in USA style but one car far up the street is parked in standard Australian style.
The sale, possession, and use of fireworks in Australia is strictly regulated and they would not be casually lying around a house as a party novelty.