I've tried reinstalling but still getting the same thing, I'm playing it with Wine on Mac so this might be causing issues although its reported as working ok here -
http://forums.civfanatics.com/showthread.php?t=492744
I can't take a screenshot as the screenshot key in steam is not working, its a normal game but loaded it through 'custom game' setup. I tried loading one with 'Play Now' and there was slight difference as I started with one less unit and -6 instead of -9, so maybe its to do with some custom settings?