When Tweener goes to the girls house, and the FBI start moving in on him, the view of the back of him shows that his hands are already on his head, but when the camera view goes back to his face, you hear an FBI agent say, "put your hands up" and Tweener puts his hands on his head then.
When FBI-agent Mahone is talking to Tweener in the holding cell, he shows the pills in his pen. He then puts two pills on the table. But in the next shot, where he shows Tweener pictures of the dead veterinary, there are three pills on the table.
When Tweener is surrounded by the police outside the house he is told to put his hands on his head and when the camera pans out he has done so, but a second later he no longer has them on his head.
The prop magazine that T-Bag holds up has a glaring typo in its title: it says "National Antropology" instead of "National Anthropology".
When Haywire is climbing into the boat on the trailer, you can see the head of a crew-member above the pickup truck in the background.