Just got back from Louisiana--my national guard unit was activated for hurricane relief--and couldn't wait to download beta three, but I haven't had much time to play yet. However, I too have experienced inability to scroll [IIRC, it was also in the earlier versions], but it doesn't seem to be consistent for me, i.e., right now, I can only scroll down, but at other times I might get two or three out of four directions. So far, I've been able to get where I wanted to go by clicking on the mini-map, so it hasn't forced me to end the game, but, like I said, I've only had a brief time with the new build.