Continuity mistake: In the first episode, when they meet as children, they seem to be about the same age. But later episodes refer to Greg as a 32-year-old lawyer, and after 2-3 years of marriage, Dharma is having her rebirthday party, which happens every 7 years. She is 28 then, so it seems like Greg is at least 5 years older, which is very noticeable as children.
Dharma & Greg (1997)
1 continuity mistake in season 2
Starring: Jenna Elfman, Thomas Gibson, Joel Murray, Mimi Kennedy
Continuity mistake: When Dharma is at her parents' house and they are drinking coffee, her mom is putting the pot at the table, then the angle changes, and then she puts the pot on the table again.
Kitty: Oh, Gregory, darling, every bride thinks she wants to cook a Thanksgiving dinner and it always ends up the same. Someone cries, someone is rushed to the emergency room and a perfectly lovely bird gets wasted. Which, if I don't eat soon, will be me.