Buddy's wife, Pickles, is played by a different, much larger, actress than in previous appearances.
Rob and Laura's car has no rear-view mirror.
The exterior shot of Rob and Laura's car going down the highway shows a hardtop; the interior scenes during their dialogue are of a convertible.
As Rob and Laura are driving home from the theatre, the scenery out of the back window is moving from right to left instead of receding away in the distance.