Winter has once come and my K-x yet once again shows its double shutter actuation symptom in *singe*-frame advance mode at outdoor under a bit colder temperature (10+ deg. C)! :-(( In summer, that thing has never happened before!
So, I tried to do some web search to see if there is any solution but of course, my effort has been in vain! But during the course, I discovered this old video, about the K-r:-
(URL: http://www.youtube.com/watch?v=zmp9vkVahjg)
Too bad and terrible! The video speaks itself, I really have no more to say! >:-(
Related:-
K-r Mirror Jumping with Manual Lenses?
Search "K-5 Mirror Jumping" at This Blog
K-5 Has Got a Cold! :-o
My K-r Burnt my Sandisk and Went Nuts! :-(