I was just going to post a query about this effect. I hadn't really noticed it up 'til now but in my latest mission a lot of action took place at dusk/night and I noticed there seemed to be some sort of flickering and shadows/certain objects were occasionally flashing in a light colour instead of dark. My wave motion was a tad stuttery too which I hadn't experienced so much in the past. Part of the reason I'm sure is that there was a lot of rain at one point which, on my system, resulted in a slight slow down.
Having said all that, are we stuck with the strobe?