I don't seem to be able to click any of the buttons in the Witcher 2 screen, only the Visit Forums button; I can't even click the FAQ buttons. I don't think there's a region lock -- that's uncharacteristic of GOG :) -- so maybe there's some other problem, like too many preorders so they disabled the buttons for a while. Does anyone else have this issue?

I'm having the same issue. I'm trying to pre-order, but I can't :(

Indeed, same here. I'm using Firefox 32-bit on Win 7 64-bit w/ NoScript but with scripting enabled for gog.com and cookies enabled.

I had the same problem until I went to GOG.com directly then clicked on The Witcher 2 icon at the top of the page. Worked just fine for me after that.

Make sure to disable adblock plus if you have it running.

How odd. That worked for me. I think, however, maybe the problem was just fixed. Because when I went back and entered the same way I did the first time, it remains working.