In the last scene on the roof as Berman (Paul Henreid) falls off the roof you can see Roger Wagner's shadow on the backdrop. It's supposed to be Paris at night with rooftops etc in the background. You can clearly see his shadow on what's supposed to be air and rooftops yards away.
The action takes place in Lucerne, Switzerland. However Lucerne is in the german speaking part of Switzerland, so the sign for the police shouldn't read "Poste de Police" (french) but "Polizei". And when Al buys a newspaper there should be papers in german instead of the french name "Le Petit Journal"