Continuity mistake: When Jesse and Becky are about to get married, Jesse goes sky diving because he says he hasn't done it before and is afraid he won't get the chance once he's married. In an earlier episode, a woman (from Rome?) comes to the house and tells Joey that they met when Jesse was sky diving and landed in her Alpha Romeo.
Continuity mistake: When Stephanie is pitching against the Cubs, they show the back side of her, and she has a lot more hair than when they do the closeup. And it's more blonde. You can also tell it's two different people because their pitching motion is different.