The guys have just watched the end of the Celtics game on TV. After the game ending buzzer, they briefly discuss why Kevin McHale played so badly during the game. They then return attention to the TV for a post-game interview with McHale. This interview begins approximately 20 seconds after the game ending buzzer and yet the background of the TV shot reveals the stadium's seats to be all but empty with only a small handful of people in a shot that shows a large portion of the seating.
While Frasier is laughing at Lilith's hairdo, there are 2 extras sitting near the door. A second later and there's only one.
After Kevin leaves the bar, having shown the guys a set of blueprints, they appear rolled, and then unrolled, and rolled again throughout the scene.
Kevin McHale is seen at Boston Garden wearing the green uniform the Celtics wear for road games as opposed to the white home uniforms.
In the opening scene, prior to the titles, Frasier gets out of his car and closes the door . The driver's side window reflects a camera turning into position.