XScreensaver: directory does not exist: "/usr/share/backgrounds"

Using Kubuntu 7.04, I installed packages xscreensaver and xscreensaver-gl

Now when i run xscreensaver-demo and change the selected screensaver to see a preview, I get a popup windows saying 'Directory does not exist: "/usr/share/backgrounds"' and OK button.

Terminal says

xscreensaver: 04:32:45: 0: unrecognised ClientMessage "_NET_WM_STATE" received
xscreensaver: 04:32:45: 0: for window 0x23032e0 (konqueror / Konqueror)
xscreensaver: 04:33:38: 0: unrecognised ClientMessage "_NET_ACTIVE_WINDOW" received
xscreensaver: 04:33:38: 0: for window 0x3a048e8 (xscreensaver-demo / Xscreensaver-demo)
xscreensaver-getimage-file: /usr/share/backgrounds does not exist
usage: xscreensaver-getimage-file [--verbose] [--name] file-or-directory

       Puts the given image file (or a randomly selected image from the
       given directory) on the root window. If --name is specified,
       just prints the selected filename to stdout instead.

xscreensaver: 04:33:40: 0: unrecognised ClientMessage "_NET_ACTIVE_WINDOW" received
xscreensaver: 04:33:40: 0: for window 0x2200173 (konqueror / Konqueror)
xscreensaver: 04:34:47: 0: unrecognised ClientMessage "_NET_ACTIVE_WINDOW" received
xscreensaver: 04:34:47: 0: for window 0x2400007 (konsole / Konsole)

I'm sure I can 'fix' this on my install by creating the folder, but I think either the directory should be created by xscreensaver, by default or xscreensaver should .. do something else than give the popup.