My girlfriend just bought a Nikon FM. Last night I was firing off the shutter and just inspecting the camera in general. Then it happened. The mirror went up, but didn't come back down. I used the little switch next to the mirror to bring it back down, but the shutter wouldn't fire after that. The mirror just kept going up and staying there. I've never seen anything like this before. She bought the camera from a (creepy) photographer that she knows and I suspect he just wanted to get rid of it because of this problem. He's a difficult person to get in touch with since he just moved to New Jersey and I fear she won't be able to return it. She's pretty upset since she really hasn't even run a roll through the camera yet. Has anyone had a similar problem with an FM series?