Factual errors: Many of Scully's actions at various times are inconsistent with her training both as a criminal investigator and a medical doctor. For example, she can often be seen handling potentially contaminated items, and even performing autopsies, without gloves. (This sort of thing is particularly noticeable in episode #6.2, "Drive", when she is poking around inside the dead woman's head.)
Audio/visual unsynchronized: When Mulder and Krump are coming down the hill where Scully is waiting, both drivers side windows are rolled down. But when Mulder stop's and Scully run's up to the car Krump's window is rolled up.
Crew or equipment visible: After about 15 minutes, during the scene in which Crump tosses out Mulder's cellphone while being chased by police, as Mulder says: "How about if we just pull over and let me out, too, huh? I must be cramping your style" something looking like camera equipment (probably filming the shots with Crump in the backseat) is visible, actually blocking what little view we have of Crump pointing his gun at Mulder.
Crew or equipment visible: (From 15:20 to 15:30) You can see camera equipment that was revealed during the show's transition from 4:3 to 16:9