Continuity mistake: Approximately 9 minutes into the film there is a scene with 'Koop' talking to a customer in the record shop. The camera cuts back and forth between views from either side of the counter. Look carefully at the turntable on the counter and you will see that even while the turntable is not switched on, the deck is in different positions between camera cuts. This is easiest to notice by looking at the angle of the word 'deconstruction' on the blue slipmat. There is even one cut where the turntable's arm is sitting in the middle of the empty slipmat, and in the next cut (and the previous cut), it's on the armrest where it belongs.
Continuity mistake: In the scene where Jip is in the club talking to the manager, the phone is on the table. In the next shot while Jip is actually on the phone and holding it, the camera angle changes and the phone is still on the table. Then the camera moves again and he's back to holding it.