When Mary is talking to Epps as Marshall is going over the WITSEC forms, the bottle in Mary's hand changes positions in between shots.
In the opening scene Kenny's arms cross and uncross between shots.
At 15:41 when Mary is using her ID to enter the cage at work, the glass panel to the right of the door shows a reflection of 2 crew members and equipment for a few seconds.
At 41:08 when Eps is walking away from Mary you can see the mic's antennae in his left back pocket sticking out over his shirt.