That's just incredible!
On my poor laptop, i get nice water transparency, but on my big PC i'm unable to get any sea transparency

Even after clean install on stock 1.5 game not modded!
If someone has any idea to help...could it be drivers? (i run latest Nvidia)
Or graphic card? (i run GTX 580)
EDIT: not drivers...rolled back 266.58 without changes!...
So maybe a DX problem?