Continuity mistake: Skeletons of murdered prisoners are dug up on prison grounds. While Brubaker & the prison doctor examine the bones, it is pouring buckets of rain. They determine the head trustee is responsible. The next scene shows a pickup speeding down a dirt road kicking up clouds of dust in the blazing sunshine. All that water sure did dry up fast.
Continuity mistake: When Brubaker is eating dinner and talking to Coombes the top is on the mayonnaise jar has a lid on it. Within a second the lid is off, and he's dipping food into it.