Throughout the movie the blue coloring in Tibby's hair gets darker and thicker.
The position of the price sticker on Tibby's head changes positions between shots from when she first sticks it on her head and when she's shown again.
When Lena is packing to go back home and she drops her paint brushes, when she bends down to pick them up and sees Bee's letter under the bed, she picks up the brushes with her left hand but places them on the floor and gets up. In the next shot we see that she's still holding the brushes.
When they first are trying on the pants. Tibby is standing outside the changing door/sheet thing and there is no hook on the wall behind her. She closes the door and opens it quickly and a hook has appeared.
When Tibby goes to visit Bailey in the hospital she looks into her room from the hallway and it appears to be fully lit. When she goes in the room is almost completely dark.
Throughout the movie, the color of the pants change. When Bailey holds them up and asks Tibby about them, the pants are light blue. Then when Bridget gets them, they are dark blue. And when Carmen wears them to go try on a dress for her dad's wedding, they are a medium blue. However, this could be part of the "magic" that adjusts the pants to each girl.
Not a goof.
When Carmen calls her father, you hear her dial 12 digits, not 11. 1+(area code)+7 digit number which makes 11 digits.
When Carmen calls her father, you hear her dial 12 digits, not 11. 1+(area code)+7 digit number which makes 11 digits.
The movie indicates that the scene, where Tibby and Bailey are looking up at the stars and when Lena and Kostas are out on the boat, are around the same time. But Maryland and Greece are in very different time zones, eight hours apart. However, it could be 10-11 at night in one place and 4-5 in the morning in the other place, so it would be dark in both places.
When Bridget and Eric are running on the beach while racing each other, a close up of their feet is shown. It is obvious that the surface used in that shot is not sand, but something much more solid.
When Carmen throws the rock at the window, the rock hits the window's left side, though the window shatters in the center.
When the girls are eating the pizza in Bridget's room, we hear Bridget say something but she has a mouthful of pizza at the time.
When the soccer girls are running by the ocean, tire marks from the camera truck are visible in the sand.
When Lena and Kostas are out on the boat, moon reflection on the sea is behind both of them, although they are sitting opposite to each other.
A FedEx airway bill is shown with an address in Maryland, but the zip code is 20510, which is the zip code for nearby Washington D.C.
The stars that Tibby and Bailey watch cannot be seen from Bethesda, Maryland, where Washington, DC, city lights blind the sky. The stars are really a studio mock-up in Vancouver, British Columbia.
Tibby's nose ring keeps changing locations between scenes. Sometimes it's on the middle of the nostril, sometimes it's too high up her nose to be real.
Actress Alexis Bledel's heritage is not Greek, but Hispanic. Lena's features do not distinguish her as a Greek person.
Carmen looks nothing like her Caucasian biological father, and no surprise since actress America Ferrera is 100% Honduran.