Originally posted by MalcS Long shot, but a software reset (menu option) can't hurt anything.
Tried that, thanks!
Originally posted by K(s)evin Another long shot...Check to make sure that all of the screws which attach the mount ring to the body are tight (next to the contacts). I had similar symptoms with my K7 last summer. While despairing, and CLOSELY examining the camera and lens for anything suspicious, I found that the lower-most screw on the mount ring was quite loose. I really didn't think that tightening it was going to help very much but.....
It's worked fine ever since.
Good Luck!
Ooh, I'll go have a look. Thanks!