When I am playing Divinity II - The Dragon Knight Saga, many (but not most) textures are transparent. I can see through certain hair styles, certain NPCs bodies and some of their heads.

I have tried installing Directx 9.0c and that did not help.

My game resolution exactly matches my desktop resolution (1920x1200). (But I tried playing under reduced resolution -- for example 1280x800 -- and that did not get rid of this issue for me, nor make it worse.)

My game performance has been reasonable.

I have the most recent drivers for my system (which, admittedly, are not very recent, since I am using GeForce 9800M GTX, and updates for mobile drivers have been rare).

My system is vista 64, and I am playing under steam.

Is there anything I can do to get rid of this issue, other than giving up on the game?