Thank you all very much for the support!
Ok, here it goes.
My setup:
Canon 50D
Canon EFS 10-22mm
Sandisk 16GB 60mb/s
RAW 1584x896
FPS 23.976
Windows 7 x64
First I made the test by goldenchild9to5 (magiclantern-2013Jul11), and everything worked out correctly, no pink corrupt frames.
GD ON with everyting off, Exposure Override On
However, I couldnt exceed 4GB because dropped frames would stop recording. I couldn't get continuos recording, even at 1474.
Then, I used Andy's build (Tragic.Lantern.Andy600build.Jul15.50D109) and I could record continuosly up to full card. However, all I got was pink corrupt frames, such as the one I uploaded. The funny fact is that when I stopped the video before the 4GB (I also recorded a 15sec video to test it), no pink frames, everything perfect.
I'm using RAW Batchelor Beta 2.3. Maybe its a spanned files problem?