In the scene where Randy bumps into Melodie at the clothing store, she has pink nail polish. In the next scene at the boat, she does not.
After Melody firsts enters Boris' apartment and is offered a can of sardines, she removes the high school jacket she is wearing. Then, after the next jump-cut, she is again shown in the process of removing the jacket.
Near the beginning of the film, when Boris is talking with his wife Jessica, the position of Jessica's arms keeps changing from shot to shot.
When Melody and her mother are visiting New York on a sightseeing bus, the first close-up shot on the bus's deck is a reverse image of the establishing shot.
Melody says she is from Mississippi and that her parents moved there from Louisiana. She also refers to living in Plaquemines County. There is no Plaquemines County is Mississippi. In Louisiana, where there are parishes instead of counties, there is a Plaquemines Parish.
In the scene where Boris is visiting the woman he accidentally injured, set in her hospital room, the boom mic is clearly visible on the left side of the screen.
Henry Cavill plays the character Randy, a British actor. No Brit would ever be called Randy because in the UK the word randy is the equivalent of horny in US English.
When Melodie says "He doesn't have a lot of patience for US inchworms.", Boris incorrectly corrects her and says "WE inchworms". Boris is supposed to be a genius, but Melodie was actually correct.
When Boris and Melody discuss the female leads in Gone With The Wind, Boris says that Scarlett has green eyes. If you watch Gone With The Wind, you will see that Scarlett (Vivien Leigh) has blue eyes.