At one point in the film Jack Wyatt (Will Ferrell) complains that in the original, Darrin was recast and no one noticed. In actual fact, fans were so turned off by the sudden, unexplained replacement of Dick York by Dick Sargent that the show plunged drastically in the ratings and was canceled soon after.
When Maria and Nina are counseling Isabel in her trailer, Maria is holding a plant. As she shifts it from one side of her lap to the other, she accidentally brushes it past Nina's face knocking her bangs into her eyes.
After Jack has been hexed by Aunt Clara, and asked Isabel out on a date, he backs toward his trailer, still talking to her. We can see his bike directly behind him, and he will trip over it in a second. After a close-up of Isabel we cut back to Jack, and only the wheel of the up-ended bike is visible. Perhaps the gag was deleted.
(at around 45 mins) In the scene when Isabels father waves to her a car drives in front of him then he disappears. as the car goes by the boom Mic and camera crane is clearly visible on the car window.
In the scenes when Nina, Maria, Aunt Clara and Isabel are having breakfast they are all sitting around the table and there is a French press coffee pot on the table. During most of the scenes when the French press is in close view either the camera or boom mic are clearly visible on the lid of the French press.
(at around 1h 35 mins) At the end of the movie when Jack and Isabel arrive at their new house, A tree appears in the front yard and their neighbor faints, right after she faints for a brief moment a crew member, the camera and boom Mic are visible as a reflection on the glass window.
(at around 41 mins) In the scene when Isabel jumps into her car outside the coffee bean as she opens and closes the door the boom Mic and the camera crane is clearly visible on the window of the car door.
In the beginning of the film when Isabelle is shopping in Bed, Bath & Beyond and is talking to her father, she selects and adds one brand of pizza cutter to her cart but then selects and adds another brand as well. Who needs two pizza cutters?