Mistakes
In the final scene with Anya and D'Hoffryn the edge of the backdrop (and the set behind it) is visible when D'Hoffryn walks around her. See more...
Trivia
Many gay and lesbian rights groups were angered by the decision to kill Tara. Joss Whedon has argued that the decision was made not because Tara was gay, but because she was involved with Willow; had Willow remained with Oz, he would have been killed instead. Killing Tara was a way for the writers to advance Willow's storyline and transform her into Dark Willow for the season finale. See more...
Movie Mistakes blog
Popular blog posts:
Top 15 biggest Harry Potter film mistakes
The 10 biggest mistakes in Iron Man 1 & 2
15 biggest mistakes in Titanic
Other great sites
Buffy The Vampire Slayer (1997) - 2 easter eggs
Directed by Joss Whedon, starring Alyson Hannigan, Amber Benson, Anthony Head, Charisma Carpenter, David Boreanaz, Eliza Dushku, Emma Caulfield, James Marsters, Juliet Landau, Kristine Sutherland, Marc Blucas, Mercedes McNab, Michelle Trachtenberg, Nicholas Brendon, Sarah Michelle Gellar, Seth Green (add more)
Easter eggs are hidden bits on DVDs which if you know where to look can provide all sorts of fun extras.