Lovers Lanes - S1-E6
Continuity mistake: Dan tells Crystal that his shoe size is 11. A few months later during episode 16, "Mall Story", Dan tells a shoe salesman he takes a size 13.
Suggested correction: Some people wear different sizes depending on the type of shoe. Not necessarily a mistake.
No Talking - S2-E12
Factual error: When Becky locks Roseanne out of her bedroom, Roseanne heads to the garage for a screwdriver to take the door off the hinges - an impossibility since the hinges are on Becky's side of the door. In the next scene, the door is off the hinges.
Suggested correction: Roseanne could have waited until Becky opened the door at a later time. She would have to come out at some point. Dan could also have ordered her to open it, and Roseanne then took it off the hingers. It was also Darlene's room, so Becky would have to let her in. Roseanne was making a point and to make sure Becky didn't do it again.