At ~32:30, when Felix is driven in his car through Manhattan, the interior is not of his early 1990s Mercedes S-class. The front window has a small front "mini" window area, and the side (wing) mirrors are not attached to the A-pillars, as is the case on the S500.
Daughter leaves ballet class with ballet slippers & no bag but, walks into apartment with running shoes.
In the last scene were Felix and are Laura together and he's in the car, Laura waves goodbye presumably looking at Felix through his rear passenger window. After a shot showing Felix being driven away down the block, Laura is shown again waving goodbye but still looking at the spot where the car had been, not where it was then heading.
A shot transition may lead the viewer to assume Laura is asleep in the same spot until the next morning, but this assumption is challenged when she wakes up wearing completely different clothing.
When Felix and Laura follow the Taxi cab occupied by Dean and Fiona; the dome light is turned off. However in the following cut the Taxi makes a right turn and Felix does the same in pursuit, the Taxi dome light is back on. Then in the next cut, as they are being pulled over by the cop car, the Taxi dome light is turned off again.
At the end Felix offers Laura his suite on the QE2 which is about to leave. The QE2 has been decommissioned and is a hotel in Dubai.
Laura is on the phone with Felix a tells him to have a "French 76". The cocktail is called a "French 75"
When Laura is crossing the street with the baby carriage in front of the H&H KIM store at the corner of Prince & Thompson; a pedestrian man wearing a backpack stops to stare at her and the action being filmed. He appears not to be part of the film.
At right around 46:19, the Mac computer time is in the 4am hour and it's light outside.
Dean leaves the club together with Fiona and they drive off in a taxi, instead of Dean returning home to his family as planned. A long chase scene by Felix & Laura is shown.
It is never properly explained where Dean and Fiona went and what was Dean's motivation for his behaviour.
It is never properly explained where Dean and Fiona went and what was Dean's motivation for his behaviour.
It is never explained why the husband all of a sudden stopped his affections to his wife the night he returned from London.