Help with 7900 gt texture transparency

Hello, I was wondering if anyone could help me. In several games I play, notably guild wars and BF2, there are problems with 2d transparencies. I took some screenshots, but basically in BF2, the grass textures are solid, and whenever a gun is fired nearby, the lighting makes them a solid bright color (kinda like blinking grass)<br /><br />In guild wars, 2-d textures (mainly grass, once again) will do the same thing, and ontop of that, the transparent part will make any 2d textures behind it (such as my cape) transparent. See the screen shots. This has always happened since I bought my card (7900 gt) and I'm thinking it might be driver issues or something?<br /><br />I did recently OC my card (600,890x2), but that didnt change anything. And I definitely wouldnt consider this artifacting, since it seems normal, no other "artifacts" have ever happened, I think it is on the software level. Anyway, any help would be greatly appreciated =).

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http://img377.imageshack.us/img377/8277/screen000ce0.th.jpg

http://img471.imageshack.us/img471/8337/screen001kj8.th.jpg