Continuity mistake: When Julian and Sonny are tying his shoe laces, you can see his trousers are navy. In the next scene going to McDonalds his trousers are blue.
Audio problem: At the park, when Sonny is talking to his two friends, Julian throws a stick in the path of a rollerblader. The scene closes with a laughing Julian proud of the fact that he tripped the poor rollerblader. We hear the blader (off-screen) yell out "G**d**n stick!" This is clearly Adam Sandler's voice (most likely dubbed in during post-production).
Continuity mistake: When Adam Sandler is shopping with the little boy throwing the cans on the ground, they change place every shot.
Continuity mistake: When Sonny and Layla are reading Julian the bedtime story, Julian's position on the pillows changes during the changing of the angles of the camera.
Continuity mistake: In the courtroom scene, Julian and Sonny embrace in a hug with Sonny's right hand over his left hand behind Julian. As they speak to one another the camera angle changes and shows Sonny's left hand on top of his right.
Revealing mistake: When Sonny puts the newspaper over the puddle of milk, notice it doesn't get wet at all. Newspaper very obviously gets wet when exposed to liquids.
Continuity mistake: When Sonny is giving Julian a bath, in the shots where Julian is closest to the camera, you can see a wide gap between the bath and the camera and even the side of the bath tub, as if it's in the middle of the room. In the shots behind Sonny, the bath is right next to a brick wall.
Answer: Maybe I'm misinterpreting the line, but I thought "big problem" in this context meant that the state would aggressively pursue criminal charges against Sonny for his actions, as in it's his big problem to deal with now.
Phaneron ★
But in that context, wouldn't it be a "big" / serious problem in any state? I can't imagine that most states would be easy-going about it. He seems to mean that it happens a lot in New York, but I might be wrong.
Other states would certainly be aggressive in that situation, but given that Mr. Brooks is an employee of the state of New York, he could just be emphasizing how much trouble Sonny is in.
Phaneron ★
Fair enough. Sonny might have thought that it was OK for him to pretend to be Kevin, since he is good friends with the real Kevin.
Mr. Brooks was being facetious by specifically saying "big problem in THIS STATE." Obviously Sonny knows what he did was very wrong and illegal. It would be like if you were driving in a different state and didn't stop at a stop sign. The cop might say "I know in your home state the stop signs are optional but here in Texas you're required to stop at the sign."