Continuity mistake: During the scene with the guys dancing in the locker room, when the coach comes in, you see the same shot of Stefen taking off his jacket twice.
Continuity mistake: When Tom Selleck rolls his plane upside down to dump the Afghan at several thousand feet altitude, you plainly see stationary tree tops at the bottom of the frame.
Continuity mistake: When the brunette is in the shower and that boy shows up he is wearing brown pants, but when you see the clothes lying on the carpet while they are in bed together, the pants are blue jeans. (00:59:00)
Continuity mistake: When Alex sits down to watch the news, the various items around the TV, magazines on the table, the cushions, cups, items on the couch etc. differ in position during the scene. (00:11:35)
Factual error: Shirley MacLaine and Jack Nicholson both live in River Oaks (very ritzy neighborhood in Houston) and are traveling to Brennans restaurant in downtown Houston maybe 5-10 miles away - but they go by way of Galveston which is about 45 miles south of Houston - which needless to say is way way out of the way... (00:50:40)
Continuity mistake: When Mary Carson is touching Father Ralph when he is shirtless her hands keep changing position between shots.
Factual error: Part of the movie takes place in Vienna, Austria. Although the number plates of the cars are like those in Austria at that time, neither the road markings nor the street car which can be seen when both Steve Martin and Kathleen Turner are "climbing" outside their hotel look like those in Vienna.
Other mistake: In the scene where Jesse enters Monica's apartment, he consults her calendar to see in which class she is in school that day. There's nothing unusual about this until you look closely at the calendar and see that time time is early/mid August. Did her school's academic year run differently from other schools' years, or was she taking summer classes? The latter doesn't seem likely.
Audio problem: When Anschel and Avigdor are arguing, Avigdor says, "Aww, what's the matter with you?" But his lips are saying something different.
Continuity mistake: Right before Stroker gets into his car to start the race at the beginning of the movie the grandstands behind him are empty, in the next shot as they are coming around to get the green flag they are full.