I made a discovery when I also started getting this a couple of weeks ago. About every 3-4 seconds, the screen would hang for half a second and then start up OK again. Thinking about what I'd changed (didn't have this before), I recalled having just discovered Project Magenta's brilliant Whazzup utility. Sure enough, closing it stopped the 4-sec stutters. Starting it brought them back. If you're having stutter issues, you might try closing Whazzup when you don't need to look at it and see if this helps. Happy flying,Philip.

lol, I had the same problem, try re-installing your graphics card driver again, that does the trick, did when I had that problem"... AND I'M PROUD TO BE AN AMERICAN!"[b/]

Hi,I had to close the Konotop scenery. The stutter was synchronised with the turning radar antenna.hm