Comment 22 for bug 507263

Theme dependent? Yes and no. Yes because that border line changes it's color according to selected theme (try DarkRoom). No because our line is exactly the _same_ line which was added to Nautilus few months ago to prettify the main folders & files pane. This line wasn't there before, and the troubles with the desktop border line started just after it's first appearance on the stage.

Why the border line appears only after some manipulation with desktop items remains mystery.