Well my monitor is being used rotated most of the time : so the DS background looks like http://www.bild.me/bild.php?file=4691234backgroundBethesda.jpg On forums pages the black cut off looks really ugly (and distracting) - maybe extend the pic to cover resolutions up to 1900x1200 ? add some gray to it ?
http://www.gamesas.com/index.php?/topic/1173879-forum-background-changes/page__st__160__p__17341970#entry17341970 restores The Elder Scrolls parchment that was present before the latest change. Maybe this will work for you.