Description of problem: I was using the prerelease 4.0.99 KDE packages, and I'd chosen a wallpaper I liked. I don't actually even know what it was called, but it was the light blue one with white swirls ... anyway, I updated to KDE 4.1.0 and this wallpaper (along with many others) seems to have disappeared. Where did they go? Version-Release number of selected component (if applicable): kdeartwork-4.1.0-1.fc9.i386
su -c "yum install kdebase-workspace-wallpapers"
Oops, should have done a bit more detective work before posting -- thanks for the quick response! (For what it's worth, my favourite wallpaper is called "Blue Curl".)