Civ 4 BTS Leader Portraits Glitch

[Cherokee Jack]

I am running Civ 4 BTS on my Mac OS X. Before I got BTS I ran Civ 4 with high graphics so I know I have the right system req. for this game. I just recently got and installed BTS so I started a game and every thing worked fine. But after the first time (and every time since) whenever I look at a leader portrait (either in the choosing screen or the diplomatic screen) there is something wrong with the character layering that makes them look weird.

I tried reinstalling the game but it does the same thing. I am running BTS without Warlords, I don't know if that makes a difference.


These attachments are screenshots of what it looks like.