I have reviewed some of my EX1 footage and there is a very small amount of shutter roll. I had to go through a lot of footage including tracking shots from train windows and fast pans of kite surfers, whip pans etc to find it. What I am saying is that while it is present, I had to actively search for it to find it. I could not find a shot where it is obvious or distracting in normal palyback. the worst I could find was about a 10 degree tilt to some telephone poles shot straight out of the window of a moving train. I hadn't noticed it before and I've watched that shot many times and only found it on a freeze frame when I was actually looking for it. So all in all for normal shooting I can't see it being an issue.