In the crowd near the end of the film, Kenny Fraiser is just wearing his regular blue shirt he has worn through out the film. However, after Barbera Jean starts singing solo, we see him come into the crowd wearing a brown jacket.
When the Mercedes bus (model O 309) breaks the gate-arm at the Nashville Airport (21:00 in), there is clear right-front damage, the bumper is bent, headlight broken, and there is no sign on the right side of the bus. But, at the freeway accident scene (22:12 in; on I-24 near Shelby Avenue), the passengers act like the damage just happened (saying: "Oh no." And looking at the damage), and now there is a sign on the right side that reads: "Connie White" and has her image.
Howard K. Smith does a report on Hal Phillip Walker, including that he had won three primaries and was close to winning the primary in Tennessee. In the movie, Walker was not running as a Democrat or Republican, but is a third-party candidate running as the "Replacement Party". He therefore would not have participated in any other party's primary and could not have been reported as having won any primaries.
When attempting to interview Tommy Brown, Opal says that she is from the BBC. When questioned, she explains that this stands for the British Broadcasting Company. It actually stands for the British Broadcasting Corporation. This was intentionally done to insinuate that Opal doesn't actually work for the BBC and was an impostor. Geraldine Chaplin confirmed this in a 2000 interview in Premiere magazine.