A while back I wrote about the movie "I Am Legend", saying it was really good right up until the last five minutes, which were a putrescent pile of gentle steaming waste matter.
Turns out an alternate ending was filmed. While it's not perfect, it's about a bazillion times better than what was released in the theater. It's out on YouTube Gametrailers. Warning: may be a little intense for the kiddies.
I like this one better for many reasons. The ending that was released was way too mystical for no reason; it was added on as a feel-good Hollywood ending that ruined the entire movie. This one isn't quite as grim as I would have liked, but it's not a fairy tale ending. Also, the zombies' intelligence was already established in the movie, so this isn't too much of a deviation from that direction.
I think the movie-going public can handle ambiguous endings, scary endings, even depressing endings. This cut would have been a (baby) step in the right direction.