Ugh, sorry, I'm not quite sure where to post this.
All I have to say is that the lovely wallpapers pack by Charlotte Winroth has the 16:9 wallpapers in the 16:10 folder and vice versa.
My monitor is 2048x1152, and I know that it's 16:9 (you could also prove that using the calculator.), but the 16:9 folder's wallpapers are 2048x1280.
