Don't know what happen :S
it doesnt show the thumbnail in wallpaper section


but it shows the thumbnail in my userpage under "My recent wallpaper" & at the home page.

Initially the thumbnails did not load for me either in both the Gallery and your userpage. But after doing a few stuffs below;

Ctrl+F5
Opening up the userpage, user gallery page, wallpaper gallery page and the actual wallpaper page
Opening up your actual fullsize wallpaper

The thumbnail appears now. Now sure which one of the above managed to get me the thumbnail.

http://xs207.xs.to/xs207/06416/Untitled-1b.jpg

The filename seems to indicate you edited the wall? It can sometimes take a while for the thumbs to sort themselves out after you edit.

Oh, right, thanks :>