I tried the Settings above but they didn´t help me....it still jerks all the time.
With the following Settings it works fine!
Sequence= AVC INTRA/1080I/AVC-I 100 1080I50
Footage: Original (1st Field First)
SourceMonitor: Rightclick/Field/Show First Field
Program Monitor: Rightclick/Field/Show First Field
Don´t change the Mercury Playback Engine, it should use the CUDA-Option!
I have a MacPro with QuadCore and NVidia Quadro 4000 2048MB and 32GB RAM.
And Adobe CS6!
Cheers, Raphael