I don't know if having flown in Beta means anything. This seems to be more of an anomoly to do with the game and certain systems. I've been flying since beta patch 20-something, and have had remarkably few video problems, at least nothing so serious I couldn't turn a few settings down and eliminate. Rather, remarkably few probs til patch 4/5.
I dumped all my non-approved skins, ran adaware, defragged, reduced texture size to 1 notch below default, loaded the performance drivers instead of quality, all in game sliders down to performance, text/frame of 1, 60 fps max, vsync on, no AAS, no AF,
1024x768, sound accel turned down, all windows control panel settings to performance, killed all extra processes, etc etc.
I have noticed that most of my stuttering freezing problems are gone, but that's a crappy way to do it (still have them occasionally, but game performance[using fps as the basis for that], being at a higher constant, doesn't suffer as badly). Have you guys tried renaming your sounds folder and running the game w/o sound to see if the stutters stopped? I had 0 probs for the 10-15 mins I flew that way, wonder if its some odd sound accel problem?
Oh, also should mention I've been rebooting after playing any other games, or using the pc for any length of time, before logging in to AH. I have no idea which of these changes has helped, but it seems to run better to me. I'm pretty confident they'll sort it out in the near future, so I'll keep playing around with it. Good luck with your problems, hope they resolve soon.
Cheers,