Incorrectly regarded as goofs: Under Academy rules a performer can be nominated for only one performance in any acting category. This rule is broken deliberately - Simone is so wonderful that the Academy is prepared to break its own rules for her.
Revealing mistakes: When Elaine is driving and talking to Simone, there is a Land Rover behind her. In the lane next to her is a Porsche and the same Land Rover, and in the third lane, yet the same Porsche and another copy of the same Land Rover.
Continuity: Lainey ejects the "The Plague ver 8.1" disk from a different machine to the one that Taransky put it into.
Continuity: After Elaine and Lainey find the computer and the virus, they restore it. However, Viktor threw the hard disk away.
Continuity: Lainey's hair while at Viktor's computer after his arrest.
Continuity: While Viktor is speaking to Simone after "Sunrise, sunset" premiere, he puts on the table a glass which alternates between being full and empty between shots.
Continuity: When Viktor says "with Hank's tragic passing his secret did die with him" we see a newspaper with a message about Hank's passing under a glass, which is supposedly on the table in front of Victor. But there is no newspaper there in any other shot.
Continuity: While Viktor is conducting talk show "Good morning, good day" with Simone, different items (ashtray, a bottle of beer, a glass, a pen) appear and disappear on the table on his right between shots.
Continuity: At the end of the movie (at a supermarket) the camera and string that Victor is holding switch hands between shots.
Anachronisms: In several instances, modern photographers are shown using ancient flash bulbs. Flash bulbs were long ago rendered obsolete by modern electronic flash units. As each flash bulb can be used only once, and as no company has manufactured them for years, the existing supply of flash bulbs is diminishing, making them fairly rare and costly items today. There may very well be some photographers who prefer to use flash bulbs for some high-minded artistic projects, but nobody would waste them on the kind of photography for which they were shown being used in this movie.
Continuity: In the hotel when the reporter feels the toilet seat, you can see that the toilet roll hasn't been used as it is still in a triangle.
Continuity: When the hologram is created for the concert, there is an actual microphone present which is not part of the hologram. During the song Simone is singing with the microphone in her hands, the microphone is missing from the standard.
Factual errors: When Lainey presses the eject button, the floppy disk ejects from under a blank cover plate, not from the floppy drive. Also, 5 1/4" disk drives in PCs did not eject disks electronically. The disk had to be ejected mechanically from the drive.
Errors made by characters (possibly deliberate errors by the filmmakers): Viktor writes "I love you Vic" on the hotel mirror. This should be "Vik".