I'm a bit confused here. Isn't Vsync the same thing as 50Hz mode. ie. the output is in lockstep with the native display mode to prevent stuttering?
AFAIK the config tool may allow an output at 50Hz but will still stutter occasionally on smooth scrolling material since the frames are not actually synchronised, just very close in refresh rate.
I feel this is an important feature of a ff/sd. Maybe I'm wrong but didn't it kinda go without saying that this worked on earlier generation sd/ff, amber etc? I have 5 IC products and at the moment I'm afraid this one is the ugly duckling without this. Is there some technical reason why it is not implemented?