Originally Posted by NarcissistZero
That's just normal UE3 pop-in... sometimes it takes a long time, for random reasons.
Also, you could have just forced v-synch through your control panel... it works.
No, it would never "pop-in" how long or close or from which side I stayed. So it is a bug, maybe with some hardware/drivers.
And VSync forcing on ATI does not work. Which reminds me: The ATI Control Panel sucks! It does not even support automatic and individual game/application profiles. I miss my 8800GTX that just died forcing me to get a good replacement (at that time ATI was the best bang for the buck).