Errors in geography: The true Gillette Wyoming is in a sage brush desert - nothing like the forested mountains of Vancouver.
Revealing mistakes: You can often see the wires when Max or Zack are running up the walls or flying around the room.
Audio/visual unsynchronized: When Logan calls Alec's phone in "Borrowed Time" you can still hear the phone ringing after Alec's voicemail answers the line.
Continuity: Logan lives in the Penthouse. But in "Female Trouble" water from his upstairs neighbor's overflowing sink drips from the ceiling.
Factual errors: In "Exposed", Original Cindy opens Sketchy's camera, overexposing the film. Later on, the prints are all shown to be solid black. In reality, the prints would have been solid white.
Continuity: In "The Berissford Agenda" Logan acts like it's the first time he's met and seen Joshua. This is false because he saw Joshua before in "Two".
Boom mic visible: In "Flushed", after Max throws the shoplifter's buddy out of his car, as she zips away in it, a boom mic and a small stage light are reflected in the rear window very briefly.