I'm having this intermittent problem that the camera does not want to focus in auto-focus. When this happens I try to switch to manual on the lens, (both 300mm, and 55mm) but the toggle button will not budge. I have to wait about 1-2 mins sometimes longer before the auto-focusing works again.
Also, I get either r08, r24, r200 showing up on the bottom right of the screen - apparently this has to do with buffering. My card was empty, lighting was great. I got the camera end of January 2013, and all was well until the beginning of March.
I did a "reset setting" thinking maybe I had set some setting that would cause this - but this didn't seem to be the case. I am using the same card I always did. Just wondering if I need to take it to the doctor's