This is discussion archived from a time before the current discussion method was installed.
Hamster Of The God: I think King Lear should be added as an example. Restoration era revivals of King Lear in the 1680's changed the play so that Codelia lived and the play has a happy ending. Wikipedia has more info http://en.wikipedia.org/wiki/King_Lear#Performance_history
Ack Sed: The title image = Made Of Win.
Ross N: Changed the Butterfly Effect - at least to me the theatrical ending came across as a Bittersweet Ending at best and certainly not 'fluffy'.