Considering file sizes for games, and hard disk space to save them on, will only increase with time, i don't think 600 megabyte saves are unreasonable. However, if there's an upper limit on what Civ4 can handle (don't know why, since other programs can work with files gigabytes larger) then if they posted something officially, then that would be that. What maddens me is they won't confess to it. Deny, deny, deny. Hey, it worked for OJ.