Continuity mistake: When Ike and Maggie are on Ike's balcony in NY, at one point they are both sitting down facing each other. Ike gets up to turn the music on and he returns to Maggie. In the wide shot, his chair that he had been sitting in earlier has disappeared. It couldn't be hidden behind the door, because that would make him too far from Maggie when they were sitting face to face.
Continuity mistake: When Ike goes into the salon looking for Maggie, she notices who he is, and shows her friend the article. The article is lying on the counter. After they finish his hair, you can still see the newspaper article on the counter and in the last shot of him standing in front of the mirror, you can plainly see the article hanging on the mirror.
Continuity mistake: In the baseball game scene, Maggie's hair is several inches past her shoulders. In the very next scene that takes place the following morning at the beauty salon, her hair is only long enough to barely touch her shoulders. In the next scene, when Maggie breaks into Ike's hotel room, not only is her hair long again, but with the exception of the cowboy hat and an additional jacket, she's wearing the exact same outfit she wore the day before at the baseball game.
Continuity mistake: Timing of the proposal and wedding seems to be an issue. The church reader board announces Sunday morning to be the time for the cancelled and current wedding when we see a maintenance person picking off the name of the groom. Going backward, there is mention that the rehearsal is "two days before." You would assume since it's dark. it's probably Friday night. After that evening, you see a daytime montage of fun things going on with the couple. One of which is Richard Gere on the phone to New York, saying he's getting married in 36 hours. It's daylight. 36 hours prior to the Sunday am wedding would be Friday pm, just after the proposal, in the dark.