Version: (using KDE KDE 3.5.6)
Installed from: Ubuntu Packages
The doc states that you can download additional wallpapers from kde-look.
It should also mention or be replaced by an explanation of the button in "Background" called "Get New Wallpapers".
Other background images can be downloaded from <ulink
the Wallpapers section</ulink> of &kde;-Look.org.
Other background images can be downloaded using <guibutton>Get New Wallpapers</guibutton>.
I just added the content in revision 649245 but since I have no permission to close bugs, it's still open. ;)
Thanks Pierre for the report.
*** Bug has been marked as fixed ***.