Yes. The following errors have been identified by fans, as well as cast and crew:

Continuity: 

	Landon’s scar/bandage disappears and reappears throughout the film.
	Landon’s script is folded several times while it is in his pocket, however whenever he is rehearsing, there is no crease in the script where it should have been folded.
	The clasp on Jamie’s necklace moves around during the play’s music sequence.
	When Landon takes Jamie out to dinner by the water the sky alternates light/dark between shots.
	The day after the play, Landon goes through the library to go to the cafeteria, he has a white shirt and blue vest on. When he goes into the cafeteria, he is wearing a white tee shirt under a green shirt. Then when he is with Eric later, he is wearing the blue and white outfit again.
	In the scene in which Jamie receives the certificate about the star he had named for her from Landon, she is clearly holding the paper and drops it as she moves to sit down. As soon as she is seated, the paper is completely missing from the scene. (This is revealed by the director’s commentary on the DVD.).
	During one scene in the hallway, Landon is hooked arms with Tracie for no apparent reason. The actors (who are friends in real life) did this because they did not realize the take was still rolling.
	During play practice, Jamie/Mandy breaks up laughing when Sally pushes Landon. Again, this was not in the script.
	During the scene on the Sullivan’s porch (when Landon gave Jamie the sweater), red and blue lights are seen in the back ground. These lights are from police cars. A car-jacking had recently taken place nearby. All of the dialog was redone in ADL (“dialog looping”) because none of the original dialog was usable.
	During the first date the time of the day and clothing seem to change periodically. It is actually LIGHT again when Rev. Sullivan tells them that the evening is over. [This may have been meant to be a montage of different dates, but it isn’t made clear in the film.]

Miscellaneous:

	The day that the flyer is made about Jamie, all of the characters are wearing exactly the same clothes as they were a few days before when Dean asked Landon if they were still cool. A few days later, when the flyers come out they all have the same clothes back on.
	When they made the flyers, the body on the flier that we see close up has a bikini on, but on the other flyers, she doesn’t have any clothes on (mentioned in DVD commentary)

Nitpicks:

	First ‘date’ night. The Virginia/North Carolina state line is about 300 miles from Beaufort, North Carolina, too far to drive to drive in an evening after dinner and be back in time for a strict curfew.
	When Jamie sings her solo “Only Hope” in the play, the only visible accompanist is a piano player, but we hear strings as well.
	Some fans have said that if you watch Landon’s final scene with Rev. Sullivan that he is not wearing his wedding ring anymore. This seems out of character for him since he says he still thinks of her often. Also the book makes it clear that after 40 years he has never had the desire to remove it. This may or may not be a costuming mistake. [NOTE: I have been unable to confirm this personally. Has anyone else seen this?]

Crew or equipment visible: 

When Landon shows Jamie the new telescope for the first time, Landon’s wireless mic. transmitter is visible as he walks towards the telescope to see the comet.