I had the dreaded lock-up problem a couple of times with the OM-D. In both cases, it had the Oly 45mm on, and I was using the YN-560II flashlight via RC. Yesterday I checked (via the known key combination startup method) to see my shutter count (it is a little over 2000, BTW). What I found out was that, on the "D" page, there was code 8807. I did a reset (holding OK+Menu for 3sec, the camera asks if you want to reset), but this didn't seem to make the reported code go away. I would like to ask all OM-D users who have experienced a lock-up to check if they have the same, or other, code in the service report page. At the moment I'm not much worried, since the camera seems to work fine in every respect and haven't experienced a lockup in any different conditions than those I mentioned. I shall contact service tommorow, since it's relatively easy to have the camera replaced in case there is something more serious. Just wanted to find what is the collective experience on this.