nightly build: Magic Lantern August 6th (32338f9) v.2.3.NEXT . 2013Aug06.5D3113
CF card used: Sandisk 60mb/s
Frame size recording: 1280x720 (listed 36.8mb/s)
It states that there is a bug and I need to report it when it automatically stops around 50+ frames.
Early stop (20) is what it says also after 97 frames on a 960x540 dimension (listed at 28.7 mb/s)