Originally posted by asharpe My K3 is fine (for the time being) but I don't shoot interval, and that seems to be a running (or "overrunning") theme here. However, my old K100D had something that the technicians called a "mirror pre-fire", where the camera would flap the mirror several times, sometimes with the shutter release, and sometimes using the green button to meter with a manual lens. It always happened with manual lenses, never with a lens that made use of the contacts on the body. I took it in for repair, they claimed they "fixed" it -- replacing a logic board, if I recall -- but the problem came right back a few weeks later (I assume they didn't try it with a manual lens, but I did mention that to them). I finally gave the camera to someone who didn't use manual lenses. My K20D also had the same sort of "mirror pre-fire" a few times, too. So, yes, it does seem that their shutter/mirror firmware/logic gates/whatever has been plaguing them for a long time. But as far as camera manufacturer problems, it's a lot better than oil splatters on the sensor.
Interval is not the running theme. Even though that's what I was doing when I ran into it so often, many of the members were not shooting interval/timelapse at all.
There were reports of the K5 also having mirror-flapping or mirror-overrun issues. I've read reports on the with the K30, Kr, K20D (not always identical symptoms, but certainly crazy mirror flapping). However, I never had the problem with the K5-II and I ran that right to 115,000 shutter actuations. I have two K5-IIs bodies, one is at 75,000 and the other at 85,000 shutter actuations and neither had had a single problem. This is one of the reasons I started to speak out about the K3. I knew some of the older bodies had the issue, and then the K3 did, but three flagship models from last year didn't have it... so Ricoh/Pentax needs to research it and get it fixed for good. It's obvious they are capable of producing a body that doesn't have some weird mirror problems, so they should.