Continuity: Regina's brother had a couple or so pencils disappear/pulled under his bed and being "eaten" by the darkness. Yet in next scenes in the movies you can see those pencils in his set again.

Audio problem: When Regina's father goes crazy while chopping the potatoes the sound of the knife hitting the board is not synchronized.

Audio problem: In the beginning of the film when Mark and his family are having the party, the camera goes over to mark talking to some buddies. One of his buddies says "I'm warning you, it's not gonna be easy for your family to live in another country, especially for the kid's." You can see that he said something else or the timing is delayed when the shot goes to his face.