When Dupontel (Jean-François Lefort) gives his concert and takes off his shirt and jacket they change places, first in front of the long end of the piano then in the next cut much closer to the keyboard end.
Around 00:24:00, when Jacques and Frédéric are talking, there is a lot of plans with continuity's problems with Frédéric's glasses (held or not in his right hand, and closed or not).