When Roseanne walks out on Dan after their fight, you can see that the diaper bag Rosanne gave to Jackie to go to the park with is sitting on the porch.
When Dan is making a sandwich during his argument with Roseanne, he takes a slice of bread out the package and closes it up. A few seconds later, the package of bread is open again and he takes out another slice.
When Roseanne and DJ find the candy wrapper in Dan's pants, DJ's can of soda alternates several times in his hand such that the brand name is sometimes visible and sometimes not.
When Roseanne storms out, Jerry's diaper bag is visible on the front porch. Jackie took it with her when she took the kids to the park before the fight.
During the end credits, it doesn't make sense that the lamp next to the TV on the 4th wall would be there. If that lamp was really there throughout the whole series, the lamp (or at least the lamp shade), being so close to the TV, would have been visible any time the top of the TV was visible in the camera shot.