During the second season, several of the interiors of the set were altered. The beige couch from the first season was replaced with a blue plaid couch. The bathroom and the hallway were altered, and the front door of Henry's apartment was changed as well.
Penelope 'Punky' Brewster:
During the opening credits you will occasionally see palm tree reflections in the windows. The series is set in Chicago, so that would be highly unlikely.
The NBC episodes were chopped from 24 minutes to 22 minutes when the show entered syndication. The DVD releases are the complete 24 minute lengths.