Crew or equipment visible: In one scene when they are driving, you can see the car which is carrying the film/sound crew, over the grandfather's shoulder.
Continuity: When the three meet the small kid who asks them for chewing gum, the kid's hands have different positions on the window when filmed from inside the car or from his back.
Factual errors: Francis Scott Key is credited for the "Star Spangled Banner". The composer, John Stafford Smith (1750-1836), should have been given credit rather than Key who was the lyricist. In the movie, the performance is played by a band and no lyrics are heard.
Incorrectly regarded as goofs: When Alex's grandfather asks Alex and Jonathan to leave, Jonathan immediately leaves, even though Alex has not translated the request into English. This, however, was most likely a creative choice to show the power and emotion of Alex's grandfather's words.
Miscellaneous: When the trio stops at the construction site, the subtitles say that the grandfather tells Alex to leave Jonathan in the car. However, in Russian, he actually says to take Jonathan with him.
Continuity: When Jonathan takes Augustine's pendant from the wall under his grandfather's portrait, he looks to the portrait and the bag is still there. Then in the next shot the bag is in his hands again.
Miscellaneous: In the credits for the song "Start Wearing Purple," Eugene Hutz's band is credited as both "Gogol Bordello" (correct spelling) and "Gogol Bodello" (incorrect spelling, dropped "r").
Continuity: When the three run out of gas and camp outdoors, Jonathan briefly holds the photo of his grandfather and Augustine with both hands. Between shots, his hands are in different positions.
Continuity: In front of the train station, Jonathan explains to Alex that he is distressed by dogs as Alex gets into the vehicle. Jonathan miraculously ends up in the vehicle after both the driver and passenger are seated in a 2-door Trabant.
Revealing mistakes: When Alexander closes his grandfather's eyes, you can see the actor playing the grandfather close them himself just before Alexander's hand passes over them.
Revealing mistakes: When the Grandfather repeatedly sounds the horn of the car, he presses the middle of the steering wheel to do so. In the Trabant, the horn is activated by pushing the signal light lever forward.