When the robbers are in the back of the van handing out the masks, Eric is handed the same mask twice.
When Eric changes his clip, he moves from the center to one of the side clips. After this happens Zoe gets the gun and it is back on the center clip (which is supposed to be empty.)
When Zoe is telling Eric what to expect and not to expect for his 1000 francs, the towel on his head switches back and forth in the way that it is on his head.
In the Dixieland club, a clarinet can be clearly heard throughout, but there's no clarinetist in the band.
At the very end, when Zoe drives Zed away from the failed raid, it is meant to be 14 July but there are no parades or holiday crowds and traffic is circulating normally.
As they enter the jazz club on the night before the heist, a Dixieland band is heard and seen playing, but the drummer is obviously not touching the drums with the drum sticks.
Shadow of the camera visible on the ground during the opening titles.