Just wanted to give an update. I've tried several revisions, with and without the megapack, over the last few months. I've now settled on the latest revision, 1082, and the latest megapack. They're fine. No reason to go back to older ones, in my opinion. Once I activated viewports, everything ran more smoothly. I've been playing 49 or even more civs on the (gigantic) Giant Earth Map, and the game is flying by with no MAF's or anything. So, I wanted to put this up officially: don't bother going back and getting the old revisions for purposes of playability or anything like that. If you have a different reason, fine, but if you're trying to avoid MAF's or CTD's, there's no need to go back to older revisions or anything like that. Viewports fixed pretty much all the problems for me. Not to mention that the latest revision is easily the best (in my opinion) in terms of the tech tree and whatnot.