Saw French arthouse thriller Hidden (a.k.a. Caché) last night at the Rialto, and apparently I'm amongst the two-thirds of people who've seen it and who "completely missed the crucial piece of visual information" in the last scene -- and the many more who did see it but like me still don't have a clue what it means. See discussion here, for example, and here. (Warning, contains spoilers.)
Call me stupid, but I still don't know whodunnit and why. But I sure want to. If anyone can just slip me the answer, I'd be most grateful.
LINKS: Update: Caché's meaning - Left Behinds
Caché - Wikipedia
Official Caché website - Sony Classics