Help! I've been experiencing a massive problem after reinstalling VI: Not everytime, but almost everytime I have to fight a battle in mediterranean climate, the battle map doesn't seem to load correctly. First it takes a lot longer than normal; then, when the battle map is up, troops deployed are visible even through terrain obstacles like hills. Everything seems to be flat. And there are unbearable lags, everything is slower than a glacier. I can exit the battle (using Esc) all right, but this loses me the battle. The campaign map doesn't seem to give me any trouble after this. I think I could even fight the battle, but it's an almost impossible drag this way.
I have the official VI patch installed, this doesn't help. Any ideas? Oh, and defragged lately and ran a virus scan, so that's not the problem.