Just as the riot begins, Charlie removes her prison uniform she is wearing normal panties. A few seconds later when she is stealing the bus she is now wearing a g-string.
During the final riot, one the guards pumps the slide on her pump action shotgun but does not fire. Edna grabs the gun off her and pumps the slide again. This should have ejected an unfired shell but it doesn't.
During the branding, the smoke rises from a spot 2-3 inches from the fresh brand.
When Lisa fell off the tower to her death, her screaming continued even after her head hit the side of the tower, which should have knocked her out at bare minimum.
Shadow visible in Dr. Norton's office the first time she tries to convince Jenny to testify.