Continuity mistake: When Sam tells Bugs that their partnership has dissolved after he starts digging for gold, Sam throws a rock at Bugs who is standing near the edge of the cliff. Behind Bugs you can see two small rocks. When he looks over the end of the cliff the rocks disappear, but in the next shot they are back again.
Continuity mistake: When Bugs digs up the ground and finds a collar button, there is a hole behind him that disappears in the next shot.
Continuity mistake: When Sam begins digging a hole at Fort Knox, you can see there is nothing behind him when he starts digging, but when he discovers gold, a sign post has disappeared.