Goofs

All of the exterior shots of the series show a front white storm door, but whenever the front door is shown from the inside, there is no storm door.

In the first season, the front door doesn't have a dead bolt on it. Then in a few episodes in the middle of the first season, the front door has a dead bolt. Then later on, the dead bolt is gone and then reappears officially in season 2.

In "Her Boyfriend's Back," Mark puts out his cigarette before he gets up from the couch to give Roseanne a message to give to Dan. As Mark is closing the door when Roseanne leaves, he has another cigarette in his hand.

In "Brain Dead Poet Society," Roseanne only serves a plate of food to Dan and Darlene, but DJ and Becky have plates of food in front of them at the end of the scene.

During the opening credits for the 1993 season, Sara Gilbert applies lots of cheese on her pizza. After putting on the cheese, she leaves the table for a minute. When she sits back down she starts putting more cheese on her pizza.

The outside of the house doesn't match the inside. Mainly, the outside shot shows the front door on the right side of the house. From the inside, the door is more centered.

In "Deliverance," you can see crew members in the mirror behind the counter at the diner.

Throughout the series, primarily the latter seasons, the boom frequently drops into the shots.