At around twenty-four minutes in, after Hannah throws a crumpled piece of paper in the trash, another student takes it out and it is not crumpled.
At around 46 minutes outside of Blue Spot Liquor the cap of the bottle in Alexs hand is off in one shot and back on the bottle after the perspective changes.
In the hallway when Hannah turns to look at Clay after someone grabs her butt, she turns and it cuts to Clay. However when Clay is shown to be staring back at her when she is already staring at him, Hannah can be seen walking, turned away from Clay while he's 'looking at her, horrified' in his shot. It then cuts back to Hannah (still staring at him) and she turns and walks away.