Factual error: When Tom calls Hannah from New York (and she is in Scotland) there is still bright daylight in New York. When Hannah answers she says it is 3am in Scotland. With a time difference of only 5 hours, this would mean it would be 10pm in New York and therefore dark.
Continuity mistake: The range rovers used to transport everyone to the wedding, or in Tom's case to wherever he was going to catch his plane, share an identical license plate number. Two different places but same id?
Continuity mistake: When Tom is standing outside looking at the pink dress in the store, his arms are bare, however he is actually wearing a long sleeve shirt. (00:33:00)
Continuity mistake: When they are all going to the wedding in the black SUVs there are three of them, driving side by side on the road. Yet in the next shot there's only one, then back and forth until they arrive at the church where there is only one where the bride gets out and everyone else greets her even though they were all arriving together.
Continuity mistake: As Tom's dad's bride (girl from Nip/Tuck)is walking into the church, her lawyer is escorting her while holding a briefcase. When he kisses her on the cheek, the camera cuts instantly to a closer shot. There are several things different in the new shot. The lawyer no longer has the briefcase, the lawyer no longer has the pre-nup in his hand, the bride's bracelet is in a different position and there are now several people in the background (there were none in the previous shot). (00:15:25)
Visible crew/equipment: When Tom is in the locker room and shuts his locker, you can see a crew member reflected on the locker's surface.
Continuity mistake: When Tom and his friend Felix are walking down the street in NY, (while Tom tells him that he is going to be the made-of-honor) they buy two bottles of water and they seem tarnished by the cold but in few shots later the cold is gone.
Continuity mistake: When Tom is in the food shop with the woman and she drops a fried dumpling on him, in the front shot she moves her chopsticks, then 2 seconds later from the side shot she moves them again.
Continuity mistake: Hannah and Tom are in the restaurant eating, and Hannah puts some of the dumpling in her mouth. From the side shot she's not chewing, then in the front shot she is, then from a side shot she puts more food in her mouth, it cuts to the front shot and she's not eating again.
Other mistake: It makes no sense that the tartan that Collin's mother puts on the wedding dress does not match the tartan that Colin is wearing at the Highland Games. Clan tartans are a big deal in Scotland so this makes no sense.
Continuity mistake: When Tom purchases the yellow roses, the bouquet appears to contain about six flowers, but when he reaches the restaurant the bouquet is much larger.
Character mistake: Tom goes with Hannah to meet with the reverend who will be conducting the ceremony. Hannah (and the credits) say his name is Rev. Feiten. However, Tom refers to him as Rev. Flint.
Revealing mistake: When Colin plays basketball he dunks the ball several times, but if you look carefully you'll notice that in some shots it's a stunt dunking for him who's taller.
