kscreensaver-xsavers-extra 4:4.5.90-0ubuntu1 (amd64 binary) in ubuntu natty

 This package allows KDE to use the "extra" XScreenSaver collection
 of screensavers from universe.
 .
 The official screensavers can be found in the 'kscreensaver' package.
 .
 This package is part of the KDE artwork module.