Since this problem is still ongoing, I'd like to keep correspondence here. The comments have been helpful, but I'm still trying to figure it out.
I've been in contact with the repair guy and haven't had a response. I really can't afford for another repair place to take advantage of my ignorance about the problem.
The shutter box was quoted as being repaired in my receipt.
There's still a roll of film in the camera which I'd like to try and finish before checking the foam, as suggested by Poisson.
Since the shutter doesn't stick when I'm quick about making an exposure (activating MLU and pressing the shutter) it sounds like this might be possible. If I activate MLU and faff about making light readings before pressing the shutter, it takes a while for it to drop down - my lull giving it time to stick?. But other than this potentially being the cause, what else would cause the mirror to stick? With a fully functional 67, after pressing the shutter, how does the mechanism work exactly to drop the mirror?
Last edited by batwister; 10-01-2012 at 02:06 PM. Click to view previous post history.