First, today Microsoft released WDDM 1.2 driver through automated update in Windows 7. As primary cause for slow scrolling at maximum zoom out level was bad WDDM 1.1 now, with newer version, this problem has gone. You may enable red borders again without fear of sluggish performance. Also this solved similar issues in other games which are using 2D vectors.
Second, what is the latest patch? I read in other thread some user is reporting 1.01d version. I only have 1.01 patch installed. Am I missing something? Also I cannot find link for AJE patch, I wonder where is it?