In one exterior shot of the plane, the firefighters are seen fighting a fire at the open doorway, yet in the next (interior) shot there is no fire in that area.
When Bernie and John are driving in stop and go traffic, the car they're in doesn't move. All the cars around it inch up and move in reverse through the entire conversation.
After the plane crash, the brake lights on Bernie's car stay on after he has gotten out of the car.
It's very unlikely that anyone would confuse Bernie LaPlante with John Bubber as they don't even sound alike.
The last name of Geena Davis' character appears as 'Gayley' in an earlier scene where she is reporting on TV, but then is spelled 'Galey' in a later scene.