KDE 3.5 desktop background changes ignored

Strange thing. This morning, I tried to change my desktop background settings in KDE 3.5, and no matter what I do, the changes never take effect. If I go back into the configure desktop dialog, I can see my new settings there, so I know they’re getting saved off.

I’ve probably got a corrupted configuration file somewhere. Does anyone know where these settings end up?

KDE configs are in ~/.kde/share/.
I found in ~.kde/share/config/kdesktoprc references to

Wallpaper$e]=$HOME/Doc........./.....jpg

per desktop.