Atonement[spoilers].
I've just got back from one of the most relentlessly depressing films I have ever seen. Actually, that's unfair. Only the last hour is the real grim-fest, with the first hour merely being fucking insane.
I learnt some very important things from this film. 1 - Keira Knightley is still smokin'. 2 - Whilst we're on that subject: smoking is cool and sexy. 3 - You can be an absolute bastard to everyone you know and still maintain a smug sense of satisfaction as long as you write a bloody book about it.
Oh, and 4 - War is pretty bleak. Even the 'uplifting' bits.