When Bo is checking out the engine before making the run for Boss Hogg, you can see the van being filled to the roof with shine. Later, while Bo's driving the van in a long shot from the front, you can see right through the back of the van like it's empty.
Beginning scenes when Bo and Luke are driving through a construction zone, the General hits a barricade and the push bar falls off, a few seconds later as Cletus starts pursuit you can see the push bar on the ground.
In the shots of the Boar's Nest that have a sign "Closed for Inventory" there is a wall directly behind the Boar's Nest building as if they were on a sound stage.