Continuity mistake: In the scene where Gwyneth is stripping at the end of the bed they start out with a front shot. She puts her hair behind her ears and there is none on the front of her. Then they switch to a back shot. She now has her hair pulled forward where it is lying on her chest.
Continuity mistake: In the scene in the restaurant when Hal is about to find out what Rosemary really looks like, Rosemary is sitting with a green napkin in her lap. When she starts to fall, from the booth breaking, the napkin is still in her lap. When Hal rushes over to help her up, the napkin is nowhere in sight.
Continuity mistake: When Hal's dad is on his deathbed, his hospital gown is wrinkled, including a large fold across his stomach. There is then a shot of Hal with his dad in the foreground and the gown is perfectly smooth. The next shot shows the dad again and the wrinkles are back. (00:03:20)
Continuity mistake: In the scene with Hal and Mauricio in the bar, they both have a beer. In the shot where Hal asks if things are okay between Mauricio and his girlfriend, Hal takes a drink from his beer and Mauricio is holding his beer down by his chest. In the next shot Hal is suddenly not drinking his beer anymore and it is out of sight and now Mauricio's beer is by his mouth. (00:06:55)