Continuity: The beginning of the movie was set on Thursday, the day after Jim died, and Bridgette's face was just fine. Later in the movie, on Saturday, Bridgette was at the funeral with cuts and stitches on her face. Then, the movie goes back to Tuesday, the day before Jim died, and they show Bridgette running into the glass door and cutting her face. So if it happened on Tuesday, the first scene of the movie (Thursday) should have shown the cuts on her face.

Other: Sandra Bullock's hair color changes from dark brown with subtle, natural highlights to dark brown with very auburn, reddish highlights. Her hair color changes back and forth throughout the movie.

Continuity: When Linda notices the ripped-out page in the phone book on Saturday, only a very small portion near the spine is left. When she actually rips it out on Tuesday, there's at least a third of the page left.

Factual error: At the hospital when Linda is committed by Dr. Norman Roth and Sheriff Reilly, she is given an injection of a sedative against her will and promptly falls asleep. However the injection she was given was an intramuscular injection, as opposed to an intravenous injection. An intramuscular injection does not make you fall asleep promptly, unlike an intravenous injection does, as it is not going directly into the blood supply.

Continuity: When Linda is writing out the calendar of the order of the events each day, she writes Mon, Tues, Wed. across the top very hurriedly. The second time we see the days, when she writes "Jim alive again", the three days are written differently. The "M" in "Mon" crosses the line below the first time but not the second. The "T" in "Tues" crosses over into the "Mon" column, almost underlining the "Mon". It is much tighter the second time we see it. The "Wed" touches the right side of the column in the first but the left side in the second. Later when she pulls out the calendar again and adds the name Claire, the days of the week are written a third way. Originally the word "Cuts" didn't have an exclamation point but later it does. The word Funeral is first written at the top of the column near the word "Sat" but later it is seen much lower down the column. The phrase "Find out Jim died" is first written very small but in a latter shot it is bigger with the "F" extending into the previous column which it didn't do earlier. It is written a third way when she pulls out the calendar again to add Claire. Apparently the calendar was written at least three times.

Plot hole: Sandra Bullock puts the dead bird in the trash can on Thursday, the first day of the movie. She takes the lid off and discovers the rotting carcass earlier in the week, so before the bird would have been put in there at all.

Plot hole: When the Doctor injects Linda with the drug, it's very obviously her upper right arm near the shoulder. But later when she wakes up in her own home, and frantically checks her arms to see if there are injection marks (meaning did it actually happen), she only pulls her sleeves up just above both elbows. She looks for needle marks only up to her elbows and just above, which was far below where the actual injection took place. Since she remembered the incident, she would have remembered where the shot was given.

Continuity: Linda's nightgown Monday morning is not the one she was wearing when she went to sleep Sunday night.

Continuity: Just after the transformer gets struck by lightning, when Jim and Linda go back into the house, Jim enters the bedroom, you can see a watch on his left hand, but when Jim sits down on the bed, the watch has vanished.

Continuity: Monday (Tuesday?) when Linda is driving down the road, distracted, her passenger side visor is down. When she gets pulled over, she needs to pull the visor down to retrieve her registration.

Continuity: When the psychiatrist is going to sedate her, he moves from her right to her left and back a few times in the same scene.

Continuity: in the scene where she goes in the bathroom and she finds the pills in the sink for the first time, she picks up the medicine bottle but when she sets it back down on the sink the bottle is a different size, it is smaller around than the one she picked up out of the sink.

Continuity: in the scene where Sandra's character is looking for the Dr. phone and the page is ripped out of the phone book, she sees it in the trash. When she goes to the trash the phone laying on the table is pointing toward the trash can but when she goes to pick it up it's turned another way.

Continuity: The daughter runs through the right right hand pane of glass, but when her father sweeps up, the broken pane is on the left.