Hey Hugues
Did you have the on screen scan invert before the grating stopped? And did the projector phase on and off?
Thats what happened with mine.I didnt get to try freescan yet -made a turntable and all ready to go when mine gets sorted.
As you saw on the email notice the second batch is being distributed -hope yours gets sorted soon also.They are trying to sort it-always difficult being an early adopter-sometimes pays to wait till the bugs have been sorted.