Comment 17 for bug 507263

After playing around with some of the easier themes (Simple-Generic) and modifying it a little in regard to the x- and ythickness values I can indeed confirm that these cause the border around the desktop.

   xthickness = 0
   ythickness = 0

in the "/usr/share/themes/Simple-Generic/gtk-2.0/gtkrc" (if you have that theme installed) - no border around the desktop.

I cannot find the widget class name of the nautilus desktop only, wich would provide a quick workaround for any theme with this problem. Anyone happen to know this?

Posting this at the end of any theme with the border problem should remove this - replace <X> by the widget name, once you found it. ;)

style "fix_nautilus_desktop_border"
{
  ythickness = "0"
  xthickness = "0"
}
widget_class "<X>" style "fix_nautilus_desktop_border"