So I've set Oblivion to play in Fullscreen mode. The launcher starts in full-screen all right, but as soon as the game proper starts, it does so in windowed mode. This problem happened suddenly after the game had been running fine in fullscreen for several days, and it has survived a complete re-install including the deletion of all local folders including the saves and inis in the user folder (which I backed up of course). The ini settings are set correctly to fullscreen and the resolution of my monitor, so what the heck is this? This is the steam version btw.