This is a change from what they said a few weeks ago. Apparently it's been patched.
I tried their automated upgrade and it failed, so now I'm downloading the "critical rebuild" patch. It's only 72 MB!
We'll see if I can now play NWN, or not. I'd better be able to, damn it. Dandi Lane, chaotic evil sorcer/rogue/red dragon disciple, must hack!