During the scene in which Perry receives a half-kilogram of cat (methcathinone) from Batista, his cell-mate (Lacey) is shown lying on the top bunk with his head on the pillow. In the following scene, as Perry turns to sit on the lower bunk, Lacey is now leaning with his back to the wall.
During the scene in which Perry meets his wife, and he looks around the doorway, behind him is a sign stating the prison regulations. However, about three quarters of the way down the list, 'prison' is erroneously spelled 'prision'.