Continuity mistake: When Mr. White is trying to calm Mr. Orange in the warehouse White pulls out a comb and uses it on Orange then goes to put it in his pocket, but lays it on Orange's chest and never picks it back up. In the next sequence when talking to Mr.Pink, White washes his hands and face, puts some water in his hair, pulls a comb out of his pocket and uses it. (00:13:05)
Other mistake: During the post-robbery flashback where Mr. White has just killed two police officers, there is a shot of Mr. White saying, "Let's go." after determining that Mr. Brown is dead. As Mr. White & Mr. Orange leave the scene, you can see 3, maybe 4 men standing perhaps 20 feet away, lounging in front of a dark blue truck. For all the car-crashing & gunshots easily within earshot, those witnesses seem awfully nonchalant. (01:25:40)kromike
Continuity mistake: During Mr. Pink's flashback, he's chased by three cops across the sidewalk of a long, straight avenue - apparently, they all pass the same exact spot numerous times. Notice the white van parking next to the sidewalk as the policemen run next to it - it is followed by a yellow truck. Look closely beneath it, and you'll spot a place where the sidewalk mixes with the road. Later on, in the wide shot of Mr. Pink running, he passes next to the same exact white van, and the same spot where the road mixes with the sidewalk is visible just next to it, right as he picks up the briefcase behind it, yet the yellow truck is gone. Since the cops are behind him, that place should be far away, as he's been running along a long avenue. [To make the street look longer, the filmmakers shot the chase a few more time on the same short street to make it look like a long avenue. Yet the white van marks the same spot, and thus it is a mistake.].
Continuity mistake: During the chase, we see that there are only three cops (we see a head-on shot of the three cops with an empty sidewalk behind them), but when Mr. Pink opens the car door and starts firing in the direction of the cops, the first three cops (the thin ones) scramble back around the corner. Just then, a fourth cop (the fat one) pops around the corner from nowhere and gets shot.