Thats funny you mention that..when I got the 3.5F, i tried all the funtions to see what i had. I notice that the self timer was stalling. So I took note of that and stopped using it. I notice too... that in the shutter speed, there I believe a 1,2 in blue colored selector that kind of funky. The shutter stays open. So i don't use that eaither. I'm sure the CLA will take care of that.