Can you please try your submission again?
DONE ! Yippee !
A bit glitchy, but it worked.
Had to upload and remove a couple of times as it thought I uploaded 2 Wallpapers instead of one for the preview place and one for the actual wallpaper place... They´re the same picture, but this is how I always do it on wincustomize.
I forgot to put the size in the description though...can I put it there now after ?