The Widescreen is not Proper for 4:3, 5:4 and 16:10, the FOV is to low it would be nice if they would add FOV slider Bar or Wheel Mouse Zoom in and out like they did with the Witcher 1, i hope this will be adress in a future patch
http://en.thewitcher.com/forum/index.php?/topic/22301-fov/
also forgot to mention the FOV is zoom in also for 16:9, but the Widescreen is set right