Wanted to share this and couldn't find the thread that focused on build 15 problems...... I had a shoot today with a client in tow. Shooting 4k 16X9, Redcode 28, 23.98, build 15. The first couple of hours the camera worked fine, but when I tried to shoot a waterfall the camera would stop recording and give me a "Codec Error" warning after about 2 seconds. After trying different things (including re-booting back to factory specs) we found that when we shot areas with little movement/detail the camera would record fine, but when the camera was recording palm trees moving in the wind or the waterfall it would jam up. When we switched to 3K it seemed to work fine as well. In the end we took the camera back to the office and loaded Buld 13 at the suggestion of tech support at Red. The up shot is.... beware of using build 15 on jobs with clients in tow!