broken KDE desktop, could have something to do with last night's updates

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http://forums.fedoraforum.org – I just logged in and the splash screen I'm using (login-scan) seemed to transfer to my desktop. Right clicking the desktop to change wallpaper didn't work for that so I went to kill the plasma-desktop process and restart it through Alt-F2, which caused my desktop to come back all garbled (as though the graphics card, an ATI Radeon x1200, was broke), but with Plasma panels intact. I'm not sure what this has to do with but I think a few packages were updated last night. Still can't right click to change desktop and I'm wondering if I need to remove .kde folder in my home directory. What's going on? (HowTos)