Should also add that I tried it under Wine with the exact same results.

*bump*

I'm having the exact same issue on my Linux laptop--that is, the screenshots show exactly what I see. Has there been any resolution to this?

I'm running Ubuntu 14.04 x64, Core 2 Duo, Intel GM45 Express graphics.

The game works fine on my newer, better Windows box--and I love it. Great game.