I got some stutters on terrain loading tonight for the first time. I was in a flight for nearly an hour and it was about 40 min's into the flight that it started to happen, so Im thinking with mine its a memory thing, perhaps reaching a limit for some reason.
It was fine when I started out. Smooth and nice...
I was tempted to test that by saving, rebooting the computer, and going back in to see if that cleared the memory.
But, it could also be my GC overheating. There was a bug with iMacs that when in Windows mode would have some issues with cooling fans running at the right speeds. I am hoping the updates took care of that.
Bill