Goof (continuity error): In the episode "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.
Goof (continuity error): In the episode "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.
Goof (crew or equipment visible): In "Deliverance", you can see crew members in the mirror behind the counter at the diner.
Goof (continuity error): 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.
Goof (continuity error): 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.
Goof (boom mic visible): Throughout the series, primarily the latter seasons, the boom frequently drops into the shots.
Goof (continuity error): In the opening scene, there is a roll of paper towels on the wall, which are draped down to the counter, and covering a blue and white container. After a few shots, a black object appears under the paper towels, with the container, and remains for a few shots. It then disappears for a few shots, and reappears near the end of the scene.
Goof (continuity error): When Dan sits down at the table to give Darlene a lecture, there are no placemats in front of him; Roseanne had just stacked them onto hers. At the end of his sentence, there are a few stacked in front of him, and only one is in front of Roseanne.
Goof (errors made by characters, possibly deliberate errors by the filmmakers): Although the master bedroom is downstairs, Roseanne tell Dan to go up in the bedroom and slip off his shoes.
Goof (continuity error): There is a family photo of the Conner's in the living room, but the episode where the photo was taken had not aired yet at the time (1:7 "The Memory Game"), so presumably, had not been taken yet.
Goof (continuity error): While Dan is cooking his chili, the kitchen cabinet door on the wall, near the stove, is cracked open five or six inches. At one point between two lines, the cabinet door is closed, then it is back open again.
Goof (errors made by characters, possibly deliberate errors by the filmmakers): At the end of the episode, Becky asks Dan to play the song and says they never got to hear it. A few lines into the song DJ starts singing along. How could he know the words if he had never heard it before?
Goof (continuity error): When Roseanne goes to the Lobo to get Dan, while they are talking at the pool table the picture next to Dan (the bottom one) is crooked when they start talking. In the shot after Roseanne says "We got beer at home." the picture is straight.
Goof (continuity error): The trash can that Darlene throws her cigarette in disappears.
Goof (errors made by characters, possibly deliberate errors by the filmmakers): When Dan was talking to Roseanne in bed, he mentions that Meramec Caverns was south of St Louis when in fact, it's west of St Louis.
Goof (boom mic visible): When Dan's father comes into the house, the boom mic is clearly visible.
Goof (continuity error): When returning from the mall, Becky hangs her coat and purse on the empty coat rack by the door, using the second peg from the left, and heads for the kitchen. When Dan walks in a few seconds later, Becky's coat and purse are now hanging from the third peg from the left, and Dan hangs his hat on the second peg. At the end of this scene, Becky's coat and purse are back on the second peg, and Dan's hat is on the third peg.
Goof (continuity error): The back wall of the kitchen which has always had cabinets and the stove running in front of them (both before this show, and after), is completely bare. No cabinets, no stove.
Goof (continuity error): In the first shot of Becky, she is on the phone as her parents are coming in the back door; her hair is down, and she starts unloading groceries. After the camera briefly shoots Roseanne and Dan walking in, it comes back to Becky; her hair is pulled back on one side revealing a lightning bolt earring. Then in another shot her hair is completely down, and then in another shot it's pulled up again, then down, then up.
Goof (continuity error): For the first half of this episode, the kitchen cabinets are solid wood tone, which is different from previous episodes. During the second half of this episode, the kitchen cabinets are back to the two-tone (wood frame, painted doors) that they usually are.
Goof (continuity error): When Roseanne first comes in from work she lays down on the couch, and an afghan is draped on the back of the right-hand side of the couch, with no clothes draped on the back. When she sits up to talk to Dan and Darlene, the afghan is now crumpled on the couch cushion, in a corner. The next shot has the afghan returned to the back of the couch, and there are now clothes draped over it as well. During the next few shots of the living room, when the camera pans away and back, the couch is in different stages of clothes on, no clothes on, afghan up, afghan down, toys on, toys off.
Goof (continuity error): When a new refrigerator is delivered to the Conner's, it's wheeled in on a dolly and parked in the living room. The dolly is strapped to the left side and the worker stuffs a crumpled delivery/sales slip under the dolly's strap near the dolly. After the worker leaves, the paper is now folded neatly under the belt, and is more on the corner, than near the dolly. During the same scene, when Dan takes back money Burt gave to Darlene, the paper is now under the strap on the front of the fridge. Seconds later, as Roseanne is crossing the living room, the paper is back on the side of the fridge next to the dolly. Having never touched the fridge, in the final scene the dolly is now strapped to the right side of the fridge, and the sales paper is gone altogether.
Goof (continuity error): In the first clear shot of the back-wall behind the kitchen stove, there is a four foot or so gap between the wall and the stove, with two paintings perpendicular to the stove (on the same side-wall with the wall-cabinets and sink). This is normally how the kitchen set looks throughout most of the shows. In the second clear shot of the back-wall, it is now flush behind the stove with no gap, and the paintings are directly behind the stove.
Goof (revealing mistake): When Becky locks herself in her bedroom, Roseanne threatens to remove the hinges from the bedroom door. She eventually does so - off camera. This is lucky, because it hides the fact that the hinges were on the other side of the door, inside the bedroom.
Goof (continuity error): When Becky and Dana are lying on the couch drunk and Becky starts talking about a previous school year, her liquor glass is not in her hand. But when the camera cuts back to Becky after Dana says the room is spinning, the glass suddenly appears in her hand.
Goof (plot holes): When Darlene comes in after basketball practice, she tosses the ball towards the closet door, only it hits the window and the sound of breaking glass is heard. This matter is never addressed throughout the rest of the episode.
Goof (continuity error): In this episode, DJ and Becky are eating breakfast at the table. Becky splashes a bowl of cereal into DJ's face and it spills all over his clothes. When Jackie gets clothes for DJ to wear from the laundry room, he gets stuck in his shirt when he is putting it on. DJ walks back and forth from the laundry room to the kitchen twice, and if his you look at his pants they change in each shot. One minute they are dark blue covered in cereal, and in the next shot they are lighter blue almost dry and clean. Then they go back to dark blue again
Goof (continuity error): The spilled cereal on DJ's clothes disappears in between shots.
Goof (continuity error): When Jackie walks in the front door, all the drawers are closed on the small dresser-like cabinet that sits beside the front door. She walks straight back to the kitchen to join Roseanne. The cabinet now has one drawer pulled slightly open. In the last shot of the cabinet in that scene, the drawer is closed again.
Goof (continuity error): Roseanne's right arm changes position while she's talking to Darlene after finding out the results of the pregnancy test. At first, her arm is bent, and she is clicking her nails; Darlene's hair is behind her shoulders. In the middle of the scene, it's in front of her shoulder on one side, and she is playing with her jacket; Roseanne's arm is now at her side. In the final shot, Roseanne is clicking her nails, and Darlene's hair is behind her shoulder.