In the kitchen when Dan is telling Roseanne about Fred going to propose to Jackie, there is a very large bruise on Roseanne's inner right forearm below her elbow. In the next scene when Fred and Jackie are back, in the living room talking to Roseanne and Dan, the bruise is gone.
When Red Buttons delivers his "adjustable Bev" joke, Roseanne is seen turning away from the camera as she breaks character and laughs.