Dear Admin,
I think 1920x1800 is not widescreen resulation.... It should be 1920x1080 pixel.
[IMG]http://i.imgur.com/qqMzVF2.jpg[/IMG]
You're right, it was a type error, the wallpaper was cropped at 1920x1080 but the label of the button was just wrong. I've fixed it now, but it may take some days to propagate the change across the website.
Thanks for the report