I noticed a strange thing happening earlier. It's not a fault, as it's mentioned in the fine print of the Firmware updates, but it's counter intuitive in a way, so I thought I should warn you guys.
The problem is with Continuous focus. What I have noticed is that continuous focus does not work as normal when the shutter mode is set to ES or MS + ES mode. If the camera is in CH or CL, instead of refocussing for each shot, the focus remains locked throughout the burst. So if your subject is moving towards or away from you, only the first shot is in focus. This happens even if the mechanical shutter is being used in MS + ES mode. Not sure why they wrote the firmware this way!
So if you're a wedding shooter using ES during the ceremony to keep quiet, make sure to switch back into MS for the aisle shots.