I started again Skyrim like 3 days ago, before that i last played when the 1.1 patch was the latest. Back then i had serious framerate problems and had to put everything to medium/low.
Now that i have the 1.7 patch, my framerates became awesome and i stay between 30-40 FPS all along on High settings, which i could hardly believe at first... good job with the optimization

Anyway, to the point: Since i got to Whiterun, anytime i'm near the Whiterun stables or just close to Whiterun, my screen just freezes anytime i try to turn around... then when it all starts moving again, i'm already facing the way i tried to turn to. It's like a slideslow.
The weird thing is that it ONLY happens near Whiterun and if i go a little bit further (to the other end of the road, opposite of the carriage) then i can turn around correctly again, without any huge lag.
Is this a known problem? Any idea what might cause it?