Destro: Everyone having problems with My Account button not displaying or some page elements not being clickable on the main page: could you please try clearing browser cache / refreshing main page couple of times? We've pushed some bug fixes that should resolve this issue in IE 8/9 and in the old FF.
Well, I've not cleared my browser cache (but I do have my browser - IE9 - set to always check for newer versions of stored pages every time I visit a webpage). As I've just booted up my machine about 15 minutes ago and loaded up GOG about 5 minutes ago I've noticed that the top bar is now working on the homepage, along with the clickable header and left/right buttons, so it appears to be working for now. I did notice, however, that it does take a few moments for all the elements of the homepage to load up and work, but that might be normal for the new design.