After the court-room scene, Karol Karol is throwing up, but we can't hear a "vomit splash", and there isn't vomit in the closet.
When our couple manage to make love, Dominique's moanings are not simultaneous with her lips.
When Karol first returns to his brother's salon after his arduous journey from Paris, he expresses delight regarding the new "neon" sign above the shop door. The brother confirms that, yes, he got a "neon" sign.
The sign is actually many incandescent light bulbs spelling out and encircling the name of the shop. There is no "neon" lighting.