Character mistake: The commentator says "avalanche of power shots by Ivan Drago." Viktor is the one in the ring. Ivan is the father. If you have the subtitles turned on, it even says Viktor in the subtitles instead of the spoken name, Ivan. (00:55:45)
Continuity mistake: After Don poured beer into his glass, the level of beer remaining in the pitcher was about one-fourth (near the lower part of the handle). Don's glass of beer was about half-full when he went to meet Mike. When Don and Mike got back to the table, the pitcher of beer was closer to half-full (near the center of the handle) and his glass of beer was down to about one-fourth. (00:00:12 - 00:01:12)
Revealing mistake: The tapered half of the baseball bat was leaning against the coffee table at about a 60° angle, but after Dave said, "The bat?" the camera showed it sticking straight up from (perpendicular to) the floor. Dave's lower body is then shown walking past the bat (which reaches to his waist) and stopping, at which point the bat fades into his leg until it is almost invisible. The next view of the bat shows it leaning against the coffee table again, but the coffee table is closer to the couch. (00:09:08)
Continuity mistake: In the van after they pick up Preacher and he mentions it's cold. Preacher leans up to the front and looks over Dax, asking about his head being too big. There are several cuts between shots here before Preacher slinks back into the van and his position of his head and shoulders changes between almost every one in various positions. (00:33:50)
Continuity mistake: When the police knocks at the door of Simon's trailer, Jean-Hugues Anglade 's arm changes position between shots as he talks to his daughter.