Dora calls her husband (Roberto Benigni) "Roberto" rather than "Guido" on one occasion.
Just before Guido is caught by the spotlight at the end of the movie, a woman belonging to the group of Jews being deported smiles to the camera.
When little Giosuè is eating with the German children, the white coffee carafes shown clearly in the foreground are made of insulated plastic, not in use in the 1940s.
When Guido is talking to Giosuè in the concentration camp, he mouths his son's lines as the boy speaks them.
When Giosuè comes out of hiding, he walks towards (and stares at) a visible spot on the ground. He stops right on top of the spot which indicates that it was his "mark" for the shot.
The champagne bottle changes position when Guido is describing how to serve lobster (first it's tilted towards the right, then centered, then tilted again, etc.). Also, the bottle is first completely sealed (with all the labels and stuff) and then we can see it without all those labels, to appear completely sealed again in a backward-to-forward take, and then opened again.
When the concentration camp is being evacuated, a half-track with the Balkenkreuz painted on it can be seen. Actually, this vehicle is an American-made M3 Half-track which was used by the Allied forces during the war and not by the Germans (although captured M3s were used by the Nazis in North Africa and on the western front).
When Dora stands up on her bed in the barracks and goes to the window to hear Guido's phonograph, some technical cable and the shadow of the crew can be seen on the left side of the screen.
When Dora kisses Guido under the table, her head is tilted to the right then is tilted to the left in the next shot.
When Guido's uncle leaves his house for the hotel, the microphone casts a shadow on the black statue on the right.
When Dora looks out her barrack to listen to the opera piece, her long hair can be seen under her scarf. In concentration camps, women's heads were regularly shaved to prevent the proliferation of lice.
After Dora told Guido that her father could make her do whatever he wanted and Guido makes an analogy with the jewel box, we see him with his right arm extended as he starts the sentence, but the scene suddenly changes as he continues, but his hand is near his chest.
Horst Buchholz (Dr. Lessing) is mistakenly credited as "Horst Bucholz."
The position of the tank in relation to the paper when Giosuè is drawing in the book store changes.