On the Season Four DVD, it appears the tag for this episode was either forgotten or edited out for whatever reason.
When Chrissy tries to leave Mr. Furley's bedroom, she uses the door that used to the Ropers' bathroom but she ends up in the living room. Later, Furley uses that door, which now is the bathroom door again, just after other cast members come in from the living room.
On the wall in Mr. Furley's bedroom hangs a life preserver labeled "S.S. Titanic." The Titanic's actual designation was "RMS Titanic."