Lincoln mentions in 4.17 that Michael was born in 1976, that's why the photo was a fake, but then at the very end it shows 1974 on his headstone.
The scene which Sucre is arrested, he has just shaved his head. But just before that scene, you can clearly see his head is not really shaved.
Micheal's mom shoots Micheal in the left shoulder, later on Micheal is applying pressure to his right shoulder instead of his left.
At first the paper dove is not visible on the grave stone, it appears when the camera angle switches.
In the scene where the General is holding a Glock on Bagwell after Michael escapes with Sara, closeups of his hand on the gun and shots of him looking at Bagwell alternate between his finger being on the trigger and off the trigger.